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Finding the Fourth Proportional to 120,875.60, 181,140.60 and 89,037.20

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Solution

The fourth proportional to 120,875.60, 181,140.60 and 89,037.20 is: 133,428.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,875.60 : 181,140.60 = 89,037.20 : x
  2. Step 2: Convert to fraction form
    120,875.60/181,140.60 = 89,037.20/x
  3. Step 3: Cross multiply
    120,875.60x = 181,140.60 × 89,037.20
  4. Step 4: Simplify right side
    120,875.60x = 16,128,251,830.32
  5. Step 5: Solve for x
    x = 16,128,251,830.32/120,875.60
  6. Step 6: Final answer
    x = 133,428.52

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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.