Home / 85,543.90-128,121.45-54,051.10

Finding the Fourth Proportional to 85,543.90, 128,121.45 and 54,051.10

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Solution

The fourth proportional to 85,543.90, 128,121.45 and 54,051.10 is: 80,953.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543.90 : 128,121.45 = 54,051.10 : x
  2. Step 2: Convert to fraction form
    85,543.90/128,121.45 = 54,051.10/x
  3. Step 3: Cross multiply
    85,543.90x = 128,121.45 × 54,051.10
  4. Step 4: Simplify right side
    85,543.90x = 6,925,105,306.10
  5. Step 5: Solve for x
    x = 6,925,105,306.10/85,543.90
  6. Step 6: Final answer
    x = 80,953.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.