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Finding the Fourth Proportional to 86,514.80, 129,808.65 and 47,100.20

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Solution

The fourth proportional to 86,514.80, 129,808.65 and 47,100.20 is: 70,670.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,514.80 : 129,808.65 = 47,100.20 : x
  2. Step 2: Convert to fraction form
    86,514.80/129,808.65 = 47,100.20/x
  3. Step 3: Cross multiply
    86,514.80x = 129,808.65 × 47,100.20
  4. Step 4: Simplify right side
    86,514.80x = 6,114,013,376.73
  5. Step 5: Solve for x
    x = 6,114,013,376.73/86,514.80
  6. Step 6: Final answer
    x = 70,670.14

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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.