Home / 128,021.80-176,670.04-71,433.12

Finding the Fourth Proportional to 128,021.80, 176,670.04 and 71,433.12

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Solution

The fourth proportional to 128,021.80, 176,670.04 and 71,433.12 is: 98,577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.80 : 176,670.04 = 71,433.12 : x
  2. Step 2: Convert to fraction form
    128,021.80/176,670.04 = 71,433.12/x
  3. Step 3: Cross multiply
    128,021.80x = 176,670.04 × 71,433.12
  4. Step 4: Simplify right side
    128,021.80x = 12,620,092,167.72
  5. Step 5: Solve for x
    x = 12,620,092,167.72/128,021.80
  6. Step 6: Final answer
    x = 98,577.68

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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.