Home / 99,740.12-137,646.68-57,301.40

Finding the Fourth Proportional to 99,740.12, 137,646.68 and 57,301.40

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Solution

The fourth proportional to 99,740.12, 137,646.68 and 57,301.40 is: 79,078.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,740.12 : 137,646.68 = 57,301.40 : x
  2. Step 2: Convert to fraction form
    99,740.12/137,646.68 = 57,301.40/x
  3. Step 3: Cross multiply
    99,740.12x = 137,646.68 × 57,301.40
  4. Step 4: Simplify right side
    99,740.12x = 7,887,347,469.35
  5. Step 5: Solve for x
    x = 7,887,347,469.35/99,740.12
  6. Step 6: Final answer
    x = 79,078.99

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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.