Home / 128,000.25-176,648.85-71,412.84

Finding the Fourth Proportional to 128,000.25, 176,648.85 and 71,412.84

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Solution

The fourth proportional to 128,000.25, 176,648.85 and 71,412.84 is: 98,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.25 : 176,648.85 = 71,412.84 : x
  2. Step 2: Convert to fraction form
    128,000.25/176,648.85 = 71,412.84/x
  3. Step 3: Cross multiply
    128,000.25x = 176,648.85 × 71,412.84
  4. Step 4: Simplify right side
    128,000.25x = 12,614,996,061.23
  5. Step 5: Solve for x
    x = 12,614,996,061.23/128,000.25
  6. Step 6: Final answer
    x = 98,554.46

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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.