Home / 128,290.12-177,045.84-71,701.50

Finding the Fourth Proportional to 128,290.12, 177,045.84 and 71,701.50

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Solution

The fourth proportional to 128,290.12, 177,045.84 and 71,701.50 is: 98,951.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.12 : 177,045.84 = 71,701.50 : x
  2. Step 2: Convert to fraction form
    128,290.12/177,045.84 = 71,701.50/x
  3. Step 3: Cross multiply
    128,290.12x = 177,045.84 × 71,701.50
  4. Step 4: Simplify right side
    128,290.12x = 12,694,452,296.76
  5. Step 5: Solve for x
    x = 12,694,452,296.76/128,290.12
  6. Step 6: Final answer
    x = 98,951.13

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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.