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Finding the Fourth Proportional to 139,010.63, 191,835.08 and 75,348.68

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Solution

The fourth proportional to 139,010.63, 191,835.08 and 75,348.68 is: 103,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.63 : 191,835.08 = 75,348.68 : x
  2. Step 2: Convert to fraction form
    139,010.63/191,835.08 = 75,348.68/x
  3. Step 3: Cross multiply
    139,010.63x = 191,835.08 × 75,348.68
  4. Step 4: Simplify right side
    139,010.63x = 14,454,518,719.78
  5. Step 5: Solve for x
    x = 14,454,518,719.78/139,010.63
  6. Step 6: Final answer
    x = 103,981.40

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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.