Home / 128,259.20-176,997.28-71,670.56

Finding the Fourth Proportional to 128,259.20, 176,997.28 and 71,670.56

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Solution

The fourth proportional to 128,259.20, 176,997.28 and 71,670.56 is: 98,905.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.20 : 176,997.28 = 71,670.56 : x
  2. Step 2: Convert to fraction form
    128,259.20/176,997.28 = 71,670.56/x
  3. Step 3: Cross multiply
    128,259.20x = 176,997.28 × 71,670.56
  4. Step 4: Simplify right side
    128,259.20x = 12,685,494,176.08
  5. Step 5: Solve for x
    x = 12,685,494,176.08/128,259.20
  6. Step 6: Final answer
    x = 98,905.14

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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.