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Finding the Fourth Proportional to 85,672.80, 128,510.16 and 35,760.48

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Solution

The fourth proportional to 85,672.80, 128,510.16 and 35,760.48 is: 53,641.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,672.80 : 128,510.16 = 35,760.48 : x
  2. Step 2: Convert to fraction form
    85,672.80/128,510.16 = 35,760.48/x
  3. Step 3: Cross multiply
    85,672.80x = 128,510.16 × 35,760.48
  4. Step 4: Simplify right side
    85,672.80x = 4,595,585,006.48
  5. Step 5: Solve for x
    x = 4,595,585,006.48/85,672.80
  6. Step 6: Final answer
    x = 53,641.12

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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.