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Finding the Fourth Proportional to 91,416.80, 137,125.20 and 72,984.80

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Solution

The fourth proportional to 91,416.80, 137,125.20 and 72,984.80 is: 109,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,416.80 : 137,125.20 = 72,984.80 : x
  2. Step 2: Convert to fraction form
    91,416.80/137,125.20 = 72,984.80/x
  3. Step 3: Cross multiply
    91,416.80x = 137,125.20 × 72,984.80
  4. Step 4: Simplify right side
    91,416.80x = 10,008,055,296.96
  5. Step 5: Solve for x
    x = 10,008,055,296.96/91,416.80
  6. Step 6: Final answer
    x = 109,477.20

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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.