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Finding the Fourth Proportional to 86,901.60, 130,352.40 and 67,218.60

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Solution

The fourth proportional to 86,901.60, 130,352.40 and 67,218.60 is: 100,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,901.60 : 130,352.40 = 67,218.60 : x
  2. Step 2: Convert to fraction form
    86,901.60/130,352.40 = 67,218.60/x
  3. Step 3: Cross multiply
    86,901.60x = 130,352.40 × 67,218.60
  4. Step 4: Simplify right side
    86,901.60x = 8,762,105,834.64
  5. Step 5: Solve for x
    x = 8,762,105,834.64/86,901.60
  6. Step 6: Final answer
    x = 100,827.90

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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.