Home / 151,438.28-208,878.90-128,620.04

Finding the Fourth Proportional to 151,438.28, 208,878.90 and 128,620.04

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Solution

The fourth proportional to 151,438.28, 208,878.90 and 128,620.04 is: 177,405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,438.28 : 208,878.90 = 128,620.04 : x
  2. Step 2: Convert to fraction form
    151,438.28/208,878.90 = 128,620.04/x
  3. Step 3: Cross multiply
    151,438.28x = 208,878.90 × 128,620.04
  4. Step 4: Simplify right side
    151,438.28x = 26,866,012,473.16
  5. Step 5: Solve for x
    x = 26,866,012,473.16/151,438.28
  6. Step 6: Final answer
    x = 177,405.69

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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.