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Finding the Fourth Proportional to 78,443.19, 108,252.44 and 42,633.20

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Solution

The fourth proportional to 78,443.19, 108,252.44 and 42,633.20 is: 58,834.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,443.19 : 108,252.44 = 42,633.20 : x
  2. Step 2: Convert to fraction form
    78,443.19/108,252.44 = 42,633.20/x
  3. Step 3: Cross multiply
    78,443.19x = 108,252.44 × 42,633.20
  4. Step 4: Simplify right side
    78,443.19x = 4,615,148,142.35
  5. Step 5: Solve for x
    x = 4,615,148,142.35/78,443.19
  6. Step 6: Final answer
    x = 58,834.27

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1.5x scale

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.