Home / 157,985.40-218,069.10-129,991.80

Finding the Fourth Proportional to 157,985.40, 218,069.10 and 129,991.80

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Solution

The fourth proportional to 157,985.40, 218,069.10 and 129,991.80 is: 179,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,985.40 : 218,069.10 = 129,991.80 : x
  2. Step 2: Convert to fraction form
    157,985.40/218,069.10 = 129,991.80/x
  3. Step 3: Cross multiply
    157,985.40x = 218,069.10 × 129,991.80
  4. Step 4: Simplify right side
    157,985.40x = 28,347,194,833.38
  5. Step 5: Solve for x
    x = 28,347,194,833.38/157,985.40
  6. Step 6: Final answer
    x = 179,429.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.