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Finding the Fourth Proportional to 98,757.80, 148,219.65 and 42,640.32

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Solution

The fourth proportional to 98,757.80, 148,219.65 and 42,640.32 is: 63,996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,757.80 : 148,219.65 = 42,640.32 : x
  2. Step 2: Convert to fraction form
    98,757.80/148,219.65 = 42,640.32/x
  3. Step 3: Cross multiply
    98,757.80x = 148,219.65 × 42,640.32
  4. Step 4: Simplify right side
    98,757.80x = 6,320,133,306.29
  5. Step 5: Solve for x
    x = 6,320,133,306.29/98,757.80
  6. Step 6: Final answer
    x = 63,996.30

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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.