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Finding the Fourth Proportional to 84,368.49, 126,552.68 and 77,328.71

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Solution

The fourth proportional to 84,368.49, 126,552.68 and 77,328.71 is: 115,993.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,368.49 : 126,552.68 = 77,328.71 : x
  2. Step 2: Convert to fraction form
    84,368.49/126,552.68 = 77,328.71/x
  3. Step 3: Cross multiply
    84,368.49x = 126,552.68 × 77,328.71
  4. Step 4: Simplify right side
    84,368.49x = 9,786,155,491.44
  5. Step 5: Solve for x
    x = 9,786,155,491.44/84,368.49
  6. Step 6: Final answer
    x = 115,993.01

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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.