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Finding the Fourth Proportional to 88,128.92, 132,014.64 and 70,389.92

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Solution

The fourth proportional to 88,128.92, 132,014.64 and 70,389.92 is: 105,442.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,128.92 : 132,014.64 = 70,389.92 : x
  2. Step 2: Convert to fraction form
    88,128.92/132,014.64 = 70,389.92/x
  3. Step 3: Cross multiply
    88,128.92x = 132,014.64 × 70,389.92
  4. Step 4: Simplify right side
    88,128.92x = 9,292,499,948.43
  5. Step 5: Solve for x
    x = 9,292,499,948.43/88,128.92
  6. Step 6: Final answer
    x = 105,442.12

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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.