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Finding the Fourth Proportional to 65,725.80, 90,510.44 and 57,107.92

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Solution

The fourth proportional to 65,725.80, 90,510.44 and 57,107.92 is: 78,642.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,725.80 : 90,510.44 = 57,107.92 : x
  2. Step 2: Convert to fraction form
    65,725.80/90,510.44 = 57,107.92/x
  3. Step 3: Cross multiply
    65,725.80x = 90,510.44 × 57,107.92
  4. Step 4: Simplify right side
    65,725.80x = 5,168,862,966.68
  5. Step 5: Solve for x
    x = 5,168,862,966.68/65,725.80
  6. Step 6: Final answer
    x = 78,642.83

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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.