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Finding the Fourth Proportional to 86,818.80, 130,023.40 and 53,641.20

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Solution

The fourth proportional to 86,818.80, 130,023.40 and 53,641.20 is: 80,335.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.80 : 130,023.40 = 53,641.20 : x
  2. Step 2: Convert to fraction form
    86,818.80/130,023.40 = 53,641.20/x
  3. Step 3: Cross multiply
    86,818.80x = 130,023.40 × 53,641.20
  4. Step 4: Simplify right side
    86,818.80x = 6,974,611,204.08
  5. Step 5: Solve for x
    x = 6,974,611,204.08/86,818.80
  6. Step 6: Final answer
    x = 80,335.26

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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.