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Finding the Fourth Proportional to 60,659.68, 83,658 and 39,431.20

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Solution

The fourth proportional to 60,659.68, 83,658 and 39,431.20 is: 54,381.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,659.68 : 83,658 = 39,431.20 : x
  2. Step 2: Convert to fraction form
    60,659.68/83,658 = 39,431.20/x
  3. Step 3: Cross multiply
    60,659.68x = 83,658 × 39,431.20
  4. Step 4: Simplify right side
    60,659.68x = 3,298,735,329.60
  5. Step 5: Solve for x
    x = 3,298,735,329.60/60,659.68
  6. Step 6: Final answer
    x = 54,381.02

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1.5x scale

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.