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Finding the Fourth Proportional to 91,480.40, 137,220.60 and 89,637.20

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Solution

The fourth proportional to 91,480.40, 137,220.60 and 89,637.20 is: 134,455.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,480.40 : 137,220.60 = 89,637.20 : x
  2. Step 2: Convert to fraction form
    91,480.40/137,220.60 = 89,637.20/x
  3. Step 3: Cross multiply
    91,480.40x = 137,220.60 × 89,637.20
  4. Step 4: Simplify right side
    91,480.40x = 12,300,070,366.32
  5. Step 5: Solve for x
    x = 12,300,070,366.32/91,480.40
  6. Step 6: Final answer
    x = 134,455.80

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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.