Home / 74,139.11-102,319.29-42,312.77

Finding the Fourth Proportional to 74,139.11, 102,319.29 and 42,312.77

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Solution

The fourth proportional to 74,139.11, 102,319.29 and 42,312.77 is: 58,395.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,139.11 : 102,319.29 = 42,312.77 : x
  2. Step 2: Convert to fraction form
    74,139.11/102,319.29 = 42,312.77/x
  3. Step 3: Cross multiply
    74,139.11x = 102,319.29 × 42,312.77
  4. Step 4: Simplify right side
    74,139.11x = 4,329,412,584.33
  5. Step 5: Solve for x
    x = 4,329,412,584.33/74,139.11
  6. Step 6: Final answer
    x = 58,395.80

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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.