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Finding the Fourth Proportional to 91,908.40, 137,862.60 and 39,323.20

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Solution

The fourth proportional to 91,908.40, 137,862.60 and 39,323.20 is: 58,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,908.40 : 137,862.60 = 39,323.20 : x
  2. Step 2: Convert to fraction form
    91,908.40/137,862.60 = 39,323.20/x
  3. Step 3: Cross multiply
    91,908.40x = 137,862.60 × 39,323.20
  4. Step 4: Simplify right side
    91,908.40x = 5,421,198,592.32
  5. Step 5: Solve for x
    x = 5,421,198,592.32/91,908.40
  6. Step 6: Final answer
    x = 58,984.80

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1.5x scale

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.