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Finding the Fourth Proportional to 66,165.80, 99,248.70 and 28,743.80

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Solution

The fourth proportional to 66,165.80, 99,248.70 and 28,743.80 is: 43,115.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,165.80 : 99,248.70 = 28,743.80 : x
  2. Step 2: Convert to fraction form
    66,165.80/99,248.70 = 28,743.80/x
  3. Step 3: Cross multiply
    66,165.80x = 99,248.70 × 28,743.80
  4. Step 4: Simplify right side
    66,165.80x = 2,852,784,783.06
  5. Step 5: Solve for x
    x = 2,852,784,783.06/66,165.80
  6. Step 6: Final answer
    x = 43,115.70

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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.