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Finding the Fourth Proportional to 74,223.56, 102,428.52 and 40,689.56

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Solution

The fourth proportional to 74,223.56, 102,428.52 and 40,689.56 is: 56,151.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,223.56 : 102,428.52 = 40,689.56 : x
  2. Step 2: Convert to fraction form
    74,223.56/102,428.52 = 40,689.56/x
  3. Step 3: Cross multiply
    74,223.56x = 102,428.52 × 40,689.56
  4. Step 4: Simplify right side
    74,223.56x = 4,167,771,513.74
  5. Step 5: Solve for x
    x = 4,167,771,513.74/74,223.56
  6. Step 6: Final answer
    x = 56,151.60

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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.