Home / 74,139.17-102,312.11-40,147.93

Finding the Fourth Proportional to 74,139.17, 102,312.11 and 40,147.93

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Solution

The fourth proportional to 74,139.17, 102,312.11 and 40,147.93 is: 55,404.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,139.17 : 102,312.11 = 40,147.93 : x
  2. Step 2: Convert to fraction form
    74,139.17/102,312.11 = 40,147.93/x
  3. Step 3: Cross multiply
    74,139.17x = 102,312.11 × 40,147.93
  4. Step 4: Simplify right side
    74,139.17x = 4,107,619,430.43
  5. Step 5: Solve for x
    x = 4,107,619,430.43/74,139.17
  6. Step 6: Final answer
    x = 55,404.17

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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.