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Finding the Fourth Proportional to 91,987.99, 137,979.23 and 25,432.11

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Solution

The fourth proportional to 91,987.99, 137,979.23 and 25,432.11 is: 38,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,987.99 : 137,979.23 = 25,432.11 : x
  2. Step 2: Convert to fraction form
    91,987.99/137,979.23 = 25,432.11/x
  3. Step 3: Cross multiply
    91,987.99x = 137,979.23 × 25,432.11
  4. Step 4: Simplify right side
    91,987.99x = 3,509,102,955.08
  5. Step 5: Solve for x
    x = 3,509,102,955.08/91,987.99
  6. Step 6: Final answer
    x = 38,147.40

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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.