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Finding the Fourth Proportional to 139,005.47, 191,827.85 and 75,343.32

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Solution

The fourth proportional to 139,005.47, 191,827.85 and 75,343.32 is: 103,973.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,005.47 : 191,827.85 = 75,343.32 : x
  2. Step 2: Convert to fraction form
    139,005.47/191,827.85 = 75,343.32/x
  3. Step 3: Cross multiply
    139,005.47x = 191,827.85 × 75,343.32
  4. Step 4: Simplify right side
    139,005.47x = 14,452,946,710.75
  5. Step 5: Solve for x
    x = 14,452,946,710.75/139,005.47
  6. Step 6: Final answer
    x = 103,973.94

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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.