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Finding the Fourth Proportional to 82,321.80, 123,482.70 and 23,159.40

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Solution

The fourth proportional to 82,321.80, 123,482.70 and 23,159.40 is: 34,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,321.80 : 123,482.70 = 23,159.40 : x
  2. Step 2: Convert to fraction form
    82,321.80/123,482.70 = 23,159.40/x
  3. Step 3: Cross multiply
    82,321.80x = 123,482.70 × 23,159.40
  4. Step 4: Simplify right side
    82,321.80x = 2,859,785,242.38
  5. Step 5: Solve for x
    x = 2,859,785,242.38/82,321.80
  6. Step 6: Final answer
    x = 34,739.10

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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.