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Finding the Fourth Proportional to 78,349.36, 108,123.24 and 42,539.44

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Solution

The fourth proportional to 78,349.36, 108,123.24 and 42,539.44 is: 58,705.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.36 : 108,123.24 = 42,539.44 : x
  2. Step 2: Convert to fraction form
    78,349.36/108,123.24 = 42,539.44/x
  3. Step 3: Cross multiply
    78,349.36x = 108,123.24 × 42,539.44
  4. Step 4: Simplify right side
    78,349.36x = 4,599,502,080.59
  5. Step 5: Solve for x
    x = 4,599,502,080.59/78,349.36
  6. Step 6: Final answer
    x = 58,705.04

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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.