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Finding the Fourth Proportional to 85,587.52, 128,425.02 and 38,834.32

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Solution

The fourth proportional to 85,587.52, 128,425.02 and 38,834.32 is: 58,271.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,587.52 : 128,425.02 = 38,834.32 : x
  2. Step 2: Convert to fraction form
    85,587.52/128,425.02 = 38,834.32/x
  3. Step 3: Cross multiply
    85,587.52x = 128,425.02 × 38,834.32
  4. Step 4: Simplify right side
    85,587.52x = 4,987,298,322.69
  5. Step 5: Solve for x
    x = 4,987,298,322.69/85,587.52
  6. Step 6: Final answer
    x = 58,271.33

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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.