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Finding the Fourth Proportional to 208,700.42, 287,687.02 and 127,978.26

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Solution

The fourth proportional to 208,700.42, 287,687.02 and 127,978.26 is: 176,414.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,700.42 : 287,687.02 = 127,978.26 : x
  2. Step 2: Convert to fraction form
    208,700.42/287,687.02 = 127,978.26/x
  3. Step 3: Cross multiply
    208,700.42x = 287,687.02 × 127,978.26
  4. Step 4: Simplify right side
    208,700.42x = 36,817,684,244.19
  5. Step 5: Solve for x
    x = 36,817,684,244.19/208,700.42
  6. Step 6: Final answer
    x = 176,414.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.