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Finding the Fourth Proportional to 78,581.62, 108,368.07 and 60,648.22

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Solution

The fourth proportional to 78,581.62, 108,368.07 and 60,648.22 is: 83,636.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581.62 : 108,368.07 = 60,648.22 : x
  2. Step 2: Convert to fraction form
    78,581.62/108,368.07 = 60,648.22/x
  3. Step 3: Cross multiply
    78,581.62x = 108,368.07 × 60,648.22
  4. Step 4: Simplify right side
    78,581.62x = 6,572,330,550.34
  5. Step 5: Solve for x
    x = 6,572,330,550.34/78,581.62
  6. Step 6: Final answer
    x = 83,636.99

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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.