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Finding the Fourth Proportional to 86,871.60, 130,281.40 and 45,295.92

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Solution

The fourth proportional to 86,871.60, 130,281.40 and 45,295.92 is: 67,930.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,871.60 : 130,281.40 = 45,295.92 : x
  2. Step 2: Convert to fraction form
    86,871.60/130,281.40 = 45,295.92/x
  3. Step 3: Cross multiply
    86,871.60x = 130,281.40 × 45,295.92
  4. Step 4: Simplify right side
    86,871.60x = 5,901,215,871.89
  5. Step 5: Solve for x
    x = 5,901,215,871.89/86,871.60
  6. Step 6: Final answer
    x = 67,930.32

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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.