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Finding the Fourth Proportional to 139,275.79, 208,833.57 and 74,280.02

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Solution

The fourth proportional to 139,275.79, 208,833.57 and 74,280.02 is: 111,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,275.79 : 208,833.57 = 74,280.02 : x
  2. Step 2: Convert to fraction form
    139,275.79/208,833.57 = 74,280.02/x
  3. Step 3: Cross multiply
    139,275.79x = 208,833.57 × 74,280.02
  4. Step 4: Simplify right side
    139,275.79x = 15,512,161,756.27
  5. Step 5: Solve for x
    x = 15,512,161,756.27/139,275.79
  6. Step 6: Final answer
    x = 111,377.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.