Home / 91,564.13-137,970.11-75,288.75

Finding the Fourth Proportional to 91,564.13, 137,970.11 and 75,288.75

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Solution

The fourth proportional to 91,564.13, 137,970.11 and 75,288.75 is: 113,446.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,564.13 : 137,970.11 = 75,288.75 : x
  2. Step 2: Convert to fraction form
    91,564.13/137,970.11 = 75,288.75/x
  3. Step 3: Cross multiply
    91,564.13x = 137,970.11 × 75,288.75
  4. Step 4: Simplify right side
    91,564.13x = 10,387,596,742.82
  5. Step 5: Solve for x
    x = 10,387,596,742.82/91,564.13
  6. Step 6: Final answer
    x = 113,446.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.