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Finding the Fourth Proportional to 86,765.92, 130,000.35 and 47,350.72

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Solution

The fourth proportional to 86,765.92, 130,000.35 and 47,350.72 is: 70,945.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,765.92 : 130,000.35 = 47,350.72 : x
  2. Step 2: Convert to fraction form
    86,765.92/130,000.35 = 47,350.72/x
  3. Step 3: Cross multiply
    86,765.92x = 130,000.35 × 47,350.72
  4. Step 4: Simplify right side
    86,765.92x = 6,155,610,172.75
  5. Step 5: Solve for x
    x = 6,155,610,172.75/86,765.92
  6. Step 6: Final answer
    x = 70,945.02

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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.