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Finding the Fourth Proportional to 86,854.86, 130,249.08 and 47,390.88

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Solution

The fourth proportional to 86,854.86, 130,249.08 and 47,390.88 is: 71,068.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,854.86 : 130,249.08 = 47,390.88 : x
  2. Step 2: Convert to fraction form
    86,854.86/130,249.08 = 47,390.88/x
  3. Step 3: Cross multiply
    86,854.86x = 130,249.08 × 47,390.88
  4. Step 4: Simplify right side
    86,854.86x = 6,172,618,520.39
  5. Step 5: Solve for x
    x = 6,172,618,520.39/86,854.86
  6. Step 6: Final answer
    x = 71,068.20

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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.