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Finding the Fourth Proportional to 98,523.20, 147,784.80 and 72,279.20

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Solution

The fourth proportional to 98,523.20, 147,784.80 and 72,279.20 is: 108,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,523.20 : 147,784.80 = 72,279.20 : x
  2. Step 2: Convert to fraction form
    98,523.20/147,784.80 = 72,279.20/x
  3. Step 3: Cross multiply
    98,523.20x = 147,784.80 × 72,279.20
  4. Step 4: Simplify right side
    98,523.20x = 10,681,767,116.16
  5. Step 5: Solve for x
    x = 10,681,767,116.16/98,523.20
  6. Step 6: Final answer
    x = 108,418.80

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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.