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Finding the Fourth Proportional to 86,981.87, 130,251.27 and 57,309.77

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Solution

The fourth proportional to 86,981.87, 130,251.27 and 57,309.77 is: 85,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,981.87 : 130,251.27 = 57,309.77 : x
  2. Step 2: Convert to fraction form
    86,981.87/130,251.27 = 57,309.77/x
  3. Step 3: Cross multiply
    86,981.87x = 130,251.27 × 57,309.77
  4. Step 4: Simplify right side
    86,981.87x = 7,464,670,866.45
  5. Step 5: Solve for x
    x = 7,464,670,866.45/86,981.87
  6. Step 6: Final answer
    x = 85,818.70

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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.