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Finding the Fourth Proportional to 138,985.80, 191,800.47 and 75,323.58

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Solution

The fourth proportional to 138,985.80, 191,800.47 and 75,323.58 is: 103,946.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,985.80 : 191,800.47 = 75,323.58 : x
  2. Step 2: Convert to fraction form
    138,985.80/191,800.47 = 75,323.58/x
  3. Step 3: Cross multiply
    138,985.80x = 191,800.47 × 75,323.58
  4. Step 4: Simplify right side
    138,985.80x = 14,447,098,046.08
  5. Step 5: Solve for x
    x = 14,447,098,046.08/138,985.80
  6. Step 6: Final answer
    x = 103,946.58

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1.5x scale

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.