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Finding the Fourth Proportional to 492,139.15, 738,117.60 and 137,079.70

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Solution

The fourth proportional to 492,139.15, 738,117.60 and 137,079.70 is: 205,594.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,139.15 : 738,117.60 = 137,079.70 : x
  2. Step 2: Convert to fraction form
    492,139.15/738,117.60 = 137,079.70/x
  3. Step 3: Cross multiply
    492,139.15x = 738,117.60 × 137,079.70
  4. Step 4: Simplify right side
    492,139.15x = 101,180,939,172.72
  5. Step 5: Solve for x
    x = 101,180,939,172.72/492,139.15
  6. Step 6: Final answer
    x = 205,594.17

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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.