Home / 91,990.14-138,038.40-38,677.92

Finding the Fourth Proportional to 91,990.14, 138,038.40 and 38,677.92

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Solution

The fourth proportional to 91,990.14, 138,038.40 and 38,677.92 is: 58,039.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,990.14 : 138,038.40 = 38,677.92 : x
  2. Step 2: Convert to fraction form
    91,990.14/138,038.40 = 38,677.92/x
  3. Step 3: Cross multiply
    91,990.14x = 138,038.40 × 38,677.92
  4. Step 4: Simplify right side
    91,990.14x = 5,339,038,192.13
  5. Step 5: Solve for x
    x = 5,339,038,192.13/91,990.14
  6. Step 6: Final answer
    x = 58,039.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.