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Finding the Fourth Proportional to 86,695.60, 130,017.48 and 45,119.92

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Solution

The fourth proportional to 86,695.60, 130,017.48 and 45,119.92 is: 67,666.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,695.60 : 130,017.48 = 45,119.92 : x
  2. Step 2: Convert to fraction form
    86,695.60/130,017.48 = 45,119.92/x
  3. Step 3: Cross multiply
    86,695.60x = 130,017.48 × 45,119.92
  4. Step 4: Simplify right side
    86,695.60x = 5,866,378,296.20
  5. Step 5: Solve for x
    x = 5,866,378,296.20/86,695.60
  6. Step 6: Final answer
    x = 67,666.39

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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.