Home / 145,414.40-218,121.60-89,427.20

Finding the Fourth Proportional to 145,414.40, 218,121.60 and 89,427.20

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Solution

The fourth proportional to 145,414.40, 218,121.60 and 89,427.20 is: 134,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,414.40 : 218,121.60 = 89,427.20 : x
  2. Step 2: Convert to fraction form
    145,414.40/218,121.60 = 89,427.20/x
  3. Step 3: Cross multiply
    145,414.40x = 218,121.60 × 89,427.20
  4. Step 4: Simplify right side
    145,414.40x = 19,506,003,947.52
  5. Step 5: Solve for x
    x = 19,506,003,947.52/145,414.40
  6. Step 6: Final answer
    x = 134,140.80

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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.