Home / 128,086.90-176,756.25-71,497.06

Finding the Fourth Proportional to 128,086.90, 176,756.25 and 71,497.06

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Solution

The fourth proportional to 128,086.90, 176,756.25 and 71,497.06 is: 98,663.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,086.90 : 176,756.25 = 71,497.06 : x
  2. Step 2: Convert to fraction form
    128,086.90/176,756.25 = 71,497.06/x
  3. Step 3: Cross multiply
    128,086.90x = 176,756.25 × 71,497.06
  4. Step 4: Simplify right side
    128,086.90x = 12,637,552,211.63
  5. Step 5: Solve for x
    x = 12,637,552,211.63/128,086.90
  6. Step 6: Final answer
    x = 98,663.89

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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.