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Finding the Fourth Proportional to 138,437.55, 207,492.30 and 124,331.40

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Solution

The fourth proportional to 138,437.55, 207,492.30 and 124,331.40 is: 186,349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,437.55 : 207,492.30 = 124,331.40 : x
  2. Step 2: Convert to fraction form
    138,437.55/207,492.30 = 124,331.40/x
  3. Step 3: Cross multiply
    138,437.55x = 207,492.30 × 124,331.40
  4. Step 4: Simplify right side
    138,437.55x = 25,797,808,148.22
  5. Step 5: Solve for x
    x = 25,797,808,148.22/138,437.55
  6. Step 6: Final answer
    x = 186,349.79

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1.5x scale

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.