Home / 78,386.47-117,626.45-28,470.49

Finding the Fourth Proportional to 78,386.47, 117,626.45 and 28,470.49

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Solution

The fourth proportional to 78,386.47, 117,626.45 and 28,470.49 is: 42,722.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,386.47 : 117,626.45 = 28,470.49 : x
  2. Step 2: Convert to fraction form
    78,386.47/117,626.45 = 28,470.49/x
  3. Step 3: Cross multiply
    78,386.47x = 117,626.45 × 28,470.49
  4. Step 4: Simplify right side
    78,386.47x = 3,348,882,232.04
  5. Step 5: Solve for x
    x = 3,348,882,232.04/78,386.47
  6. Step 6: Final answer
    x = 42,722.71

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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.