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Finding the Fourth Proportional to 121,281.60, 181,749.60 and 89,443.20

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Solution

The fourth proportional to 121,281.60, 181,749.60 and 89,443.20 is: 134,037.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,281.60 : 181,749.60 = 89,443.20 : x
  2. Step 2: Convert to fraction form
    121,281.60/181,749.60 = 89,443.20/x
  3. Step 3: Cross multiply
    121,281.60x = 181,749.60 × 89,443.20
  4. Step 4: Simplify right side
    121,281.60x = 16,256,265,822.72
  5. Step 5: Solve for x
    x = 16,256,265,822.72/121,281.60
  6. Step 6: Final answer
    x = 134,037.36

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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.