Home / 128,666.29-177,554.29-71,306.45

Finding the Fourth Proportional to 128,666.29, 177,554.29 and 71,306.45

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Solution

The fourth proportional to 128,666.29, 177,554.29 and 71,306.45 is: 98,400.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,666.29 : 177,554.29 = 71,306.45 : x
  2. Step 2: Convert to fraction form
    128,666.29/177,554.29 = 71,306.45/x
  3. Step 3: Cross multiply
    128,666.29x = 177,554.29 × 71,306.45
  4. Step 4: Simplify right side
    128,666.29x = 12,660,766,102.17
  5. Step 5: Solve for x
    x = 12,660,766,102.17/128,666.29
  6. Step 6: Final answer
    x = 98,400.02

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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.