Home / 128,011.01-176,655.20-71,422.38

Finding the Fourth Proportional to 128,011.01, 176,655.20 and 71,422.38

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Solution

The fourth proportional to 128,011.01, 176,655.20 and 71,422.38 is: 98,562.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,011.01 : 176,655.20 = 71,422.38 : x
  2. Step 2: Convert to fraction form
    128,011.01/176,655.20 = 71,422.38/x
  3. Step 3: Cross multiply
    128,011.01x = 176,655.20 × 71,422.38
  4. Step 4: Simplify right side
    128,011.01x = 12,617,134,466.26
  5. Step 5: Solve for x
    x = 12,617,134,466.26/128,011.01
  6. Step 6: Final answer
    x = 98,562.89

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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.