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Finding the Fourth Proportional to 86,937.60, 130,564.80 and 51,945.60

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Solution

The fourth proportional to 86,937.60, 130,564.80 and 51,945.60 is: 78,013.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,937.60 : 130,564.80 = 51,945.60 : x
  2. Step 2: Convert to fraction form
    86,937.60/130,564.80 = 51,945.60/x
  3. Step 3: Cross multiply
    86,937.60x = 130,564.80 × 51,945.60
  4. Step 4: Simplify right side
    86,937.60x = 6,782,266,874.88
  5. Step 5: Solve for x
    x = 6,782,266,874.88/86,937.60
  6. Step 6: Final answer
    x = 78,013.04

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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.