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Finding the Fourth Proportional to 86,307.76, 129,461.36 and 38,867.36

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Solution

The fourth proportional to 86,307.76, 129,461.36 and 38,867.36 is: 58,300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,307.76 : 129,461.36 = 38,867.36 : x
  2. Step 2: Convert to fraction form
    86,307.76/129,461.36 = 38,867.36/x
  3. Step 3: Cross multiply
    86,307.76x = 129,461.36 × 38,867.36
  4. Step 4: Simplify right side
    86,307.76x = 5,031,821,285.21
  5. Step 5: Solve for x
    x = 5,031,821,285.21/86,307.76
  6. Step 6: Final answer
    x = 58,300.91

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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.