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Finding the Fourth Proportional to 140,521.92, 193,924.87 and 76,859.72

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Solution

The fourth proportional to 140,521.92, 193,924.87 and 76,859.72 is: 106,068.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,521.92 : 193,924.87 = 76,859.72 : x
  2. Step 2: Convert to fraction form
    140,521.92/193,924.87 = 76,859.72/x
  3. Step 3: Cross multiply
    140,521.92x = 193,924.87 × 76,859.72
  4. Step 4: Simplify right side
    140,521.92x = 14,905,010,047.46
  5. Step 5: Solve for x
    x = 14,905,010,047.46/140,521.92
  6. Step 6: Final answer
    x = 106,068.93

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1.5x scale

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.