Home / 128,759.04-177,687.87-71,402.40

Finding the Fourth Proportional to 128,759.04, 177,687.87 and 71,402.40

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Solution

The fourth proportional to 128,759.04, 177,687.87 and 71,402.40 is: 98,535.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,759.04 : 177,687.87 = 71,402.40 : x
  2. Step 2: Convert to fraction form
    128,759.04/177,687.87 = 71,402.40/x
  3. Step 3: Cross multiply
    128,759.04x = 177,687.87 × 71,402.40
  4. Step 4: Simplify right side
    128,759.04x = 12,687,340,368.89
  5. Step 5: Solve for x
    x = 12,687,340,368.89/128,759.04
  6. Step 6: Final answer
    x = 98,535.53

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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.