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Finding the Fourth Proportional to 74,123.79, 102,290.89 and 40,132.30

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Solution

The fourth proportional to 74,123.79, 102,290.89 and 40,132.30 is: 55,382.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,123.79 : 102,290.89 = 40,132.30 : x
  2. Step 2: Convert to fraction form
    74,123.79/102,290.89 = 40,132.30/x
  3. Step 3: Cross multiply
    74,123.79x = 102,290.89 × 40,132.30
  4. Step 4: Simplify right side
    74,123.79x = 4,105,168,328.69
  5. Step 5: Solve for x
    x = 4,105,168,328.69/74,123.79
  6. Step 6: Final answer
    x = 55,382.60

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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.