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Finding the Fourth Proportional to 86,871.76, 130,307.74 and 34,279.88

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Solution

The fourth proportional to 86,871.76, 130,307.74 and 34,279.88 is: 51,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,871.76 : 130,307.74 = 34,279.88 : x
  2. Step 2: Convert to fraction form
    86,871.76/130,307.74 = 34,279.88/x
  3. Step 3: Cross multiply
    86,871.76x = 130,307.74 × 34,279.88
  4. Step 4: Simplify right side
    86,871.76x = 4,466,932,953.03
  5. Step 5: Solve for x
    x = 4,466,932,953.03/86,871.76
  6. Step 6: Final answer
    x = 51,419.85

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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.