Home / 128,255.04-176,988.56-71,666.88

Finding the Fourth Proportional to 128,255.04, 176,988.56 and 71,666.88

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Solution

The fourth proportional to 128,255.04, 176,988.56 and 71,666.88 is: 98,898.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,255.04 : 176,988.56 = 71,666.88 : x
  2. Step 2: Convert to fraction form
    128,255.04/176,988.56 = 71,666.88/x
  3. Step 3: Cross multiply
    128,255.04x = 176,988.56 × 71,666.88
  4. Step 4: Simplify right side
    128,255.04x = 12,684,217,890.89
  5. Step 5: Solve for x
    x = 12,684,217,890.89/128,255.04
  6. Step 6: Final answer
    x = 98,898.40

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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.