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Finding the Fourth Proportional to 139,719.76, 193,009.32 and 124,607.58

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Solution

The fourth proportional to 139,719.76, 193,009.32 and 124,607.58 is: 172,133.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719.76 : 193,009.32 = 124,607.58 : x
  2. Step 2: Convert to fraction form
    139,719.76/193,009.32 = 124,607.58/x
  3. Step 3: Cross multiply
    139,719.76x = 193,009.32 × 124,607.58
  4. Step 4: Simplify right side
    139,719.76x = 24,050,424,282.65
  5. Step 5: Solve for x
    x = 24,050,424,282.65/139,719.76
  6. Step 6: Final answer
    x = 172,133.31

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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.