Home / 139,531.76-192,541.32-77,443.88

Finding the Fourth Proportional to 139,531.76, 192,541.32 and 77,443.88

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Solution

The fourth proportional to 139,531.76, 192,541.32 and 77,443.88 is: 106,865.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,531.76 : 192,541.32 = 77,443.88 : x
  2. Step 2: Convert to fraction form
    139,531.76/192,541.32 = 77,443.88/x
  3. Step 3: Cross multiply
    139,531.76x = 192,541.32 × 77,443.88
  4. Step 4: Simplify right side
    139,531.76x = 14,911,146,881.12
  5. Step 5: Solve for x
    x = 14,911,146,881.12/139,531.76
  6. Step 6: Final answer
    x = 106,865.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.