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Finding the Fourth Proportional to 121,155.60, 181,560.60 and 89,317.20

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Solution

The fourth proportional to 121,155.60, 181,560.60 and 89,317.20 is: 133,848.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,155.60 : 181,560.60 = 89,317.20 : x
  2. Step 2: Convert to fraction form
    121,155.60/181,560.60 = 89,317.20/x
  3. Step 3: Cross multiply
    121,155.60x = 181,560.60 × 89,317.20
  4. Step 4: Simplify right side
    121,155.60x = 16,216,484,422.32
  5. Step 5: Solve for x
    x = 16,216,484,422.32/121,155.60
  6. Step 6: Final answer
    x = 133,848.41

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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.