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Finding the Fourth Proportional to 83,438.48, 124,960.08 and 65,790.20

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Solution

The fourth proportional to 83,438.48, 124,960.08 and 65,790.20 is: 98,529.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,438.48 : 124,960.08 = 65,790.20 : x
  2. Step 2: Convert to fraction form
    83,438.48/124,960.08 = 65,790.20/x
  3. Step 3: Cross multiply
    83,438.48x = 124,960.08 × 65,790.20
  4. Step 4: Simplify right side
    83,438.48x = 8,221,148,655.22
  5. Step 5: Solve for x
    x = 8,221,148,655.22/83,438.48
  6. Step 6: Final answer
    x = 98,529.46

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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.