Home / 128,130.48-176,820.38-71,543.88

Finding the Fourth Proportional to 128,130.48, 176,820.38 and 71,543.88

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Solution

The fourth proportional to 128,130.48, 176,820.38 and 71,543.88 is: 98,730.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,130.48 : 176,820.38 = 71,543.88 : x
  2. Step 2: Convert to fraction form
    128,130.48/176,820.38 = 71,543.88/x
  3. Step 3: Cross multiply
    128,130.48x = 176,820.38 × 71,543.88
  4. Step 4: Simplify right side
    128,130.48x = 12,650,415,690.56
  5. Step 5: Solve for x
    x = 12,650,415,690.56/128,130.48
  6. Step 6: Final answer
    x = 98,730.73

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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.