Home / 82,731.76-124,095.40-20,402.80

Finding the Fourth Proportional to 82,731.76, 124,095.40 and 20,402.80

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Solution

The fourth proportional to 82,731.76, 124,095.40 and 20,402.80 is: 30,603.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,731.76 : 124,095.40 = 20,402.80 : x
  2. Step 2: Convert to fraction form
    82,731.76/124,095.40 = 20,402.80/x
  3. Step 3: Cross multiply
    82,731.76x = 124,095.40 × 20,402.80
  4. Step 4: Simplify right side
    82,731.76x = 2,531,893,627.12
  5. Step 5: Solve for x
    x = 2,531,893,627.12/82,731.76
  6. Step 6: Final answer
    x = 30,603.65

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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.