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Finding the Fourth Proportional to 73,921, 102,010.98 and 40,387.24

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Solution

The fourth proportional to 73,921, 102,010.98 and 40,387.24 is: 55,734.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,921 : 102,010.98 = 40,387.24 : x
  2. Step 2: Convert to fraction form
    73,921/102,010.98 = 40,387.24/x
  3. Step 3: Cross multiply
    73,921x = 102,010.98 × 40,387.24
  4. Step 4: Simplify right side
    73,921x = 4,119,941,931.90
  5. Step 5: Solve for x
    x = 4,119,941,931.90/73,921
  6. Step 6: Final answer
    x = 55,734.39

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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.