Home / 128,681.50-177,591.24-71,334.84

Finding the Fourth Proportional to 128,681.50, 177,591.24 and 71,334.84

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Solution

The fourth proportional to 128,681.50, 177,591.24 and 71,334.84 is: 98,448.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,681.50 : 177,591.24 = 71,334.84 : x
  2. Step 2: Convert to fraction form
    128,681.50/177,591.24 = 71,334.84/x
  3. Step 3: Cross multiply
    128,681.50x = 177,591.24 × 71,334.84
  4. Step 4: Simplify right side
    128,681.50x = 12,668,442,690.80
  5. Step 5: Solve for x
    x = 12,668,442,690.80/128,681.50
  6. Step 6: Final answer
    x = 98,448.05

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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.