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Finding the Fourth Proportional to 78,563.54, 108,417.47 and 42,753.54

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Solution

The fourth proportional to 78,563.54, 108,417.47 and 42,753.54 is: 58,999.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,563.54 : 108,417.47 = 42,753.54 : x
  2. Step 2: Convert to fraction form
    78,563.54/108,417.47 = 42,753.54/x
  3. Step 3: Cross multiply
    78,563.54x = 108,417.47 × 42,753.54
  4. Step 4: Simplify right side
    78,563.54x = 4,635,230,098.26
  5. Step 5: Solve for x
    x = 4,635,230,098.26/78,563.54
  6. Step 6: Final answer
    x = 58,999.76

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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.