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Finding the Fourth Proportional to 74,420.68, 102,700.13 and 40,428.89

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Solution

The fourth proportional to 74,420.68, 102,700.13 and 40,428.89 is: 55,791.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420.68 : 102,700.13 = 40,428.89 : x
  2. Step 2: Convert to fraction form
    74,420.68/102,700.13 = 40,428.89/x
  3. Step 3: Cross multiply
    74,420.68x = 102,700.13 × 40,428.89
  4. Step 4: Simplify right side
    74,420.68x = 4,152,052,313.36
  5. Step 5: Solve for x
    x = 4,152,052,313.36/74,420.68
  6. Step 6: Final answer
    x = 55,791.65

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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.