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Finding the Fourth Proportional to 86,656.65, 129,897.50 and 47,131.89

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Solution

The fourth proportional to 86,656.65, 129,897.50 and 47,131.89 is: 70,650.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,656.65 : 129,897.50 = 47,131.89 : x
  2. Step 2: Convert to fraction form
    86,656.65/129,897.50 = 47,131.89/x
  3. Step 3: Cross multiply
    86,656.65x = 129,897.50 × 47,131.89
  4. Step 4: Simplify right side
    86,656.65x = 6,122,314,445.62
  5. Step 5: Solve for x
    x = 6,122,314,445.62/86,656.65
  6. Step 6: Final answer
    x = 70,650.26

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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.