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Finding the Fourth Proportional to 167,141,985.80, 250,712,978.70 and 128,878,233.80

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Solution

The fourth proportional to 167,141,985.80, 250,712,978.70 and 128,878,233.80 is: 193,317,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,141,985.80 : 250,712,978.70 = 128,878,233.80 : x
  2. Step 2: Convert to fraction form
    167,141,985.80/250,712,978.70 = 128,878,233.80/x
  3. Step 3: Cross multiply
    167,141,985.80x = 250,712,978.70 × 128,878,233.80
  4. Step 4: Simplify right side
    167,141,985.80x = 32,311,445,885,593,016
  5. Step 5: Solve for x
    x = 32,311,445,885,593,016/167,141,985.80
  6. Step 6: Final answer
    x = 193,317,350.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.