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Finding the Fourth Proportional to 82,953.40, 124,430.10 and 20,623.90

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Solution

The fourth proportional to 82,953.40, 124,430.10 and 20,623.90 is: 30,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,953.40 : 124,430.10 = 20,623.90 : x
  2. Step 2: Convert to fraction form
    82,953.40/124,430.10 = 20,623.90/x
  3. Step 3: Cross multiply
    82,953.40x = 124,430.10 × 20,623.90
  4. Step 4: Simplify right side
    82,953.40x = 2,566,233,939.39
  5. Step 5: Solve for x
    x = 2,566,233,939.39/82,953.40
  6. Step 6: Final answer
    x = 30,935.85

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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.