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Finding the Fourth Proportional to 78,588.52, 108,453.54 and 42,779.56

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Solution

The fourth proportional to 78,588.52, 108,453.54 and 42,779.56 is: 59,036.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,588.52 : 108,453.54 = 42,779.56 : x
  2. Step 2: Convert to fraction form
    78,588.52/108,453.54 = 42,779.56/x
  3. Step 3: Cross multiply
    78,588.52x = 108,453.54 × 42,779.56
  4. Step 4: Simplify right side
    78,588.52x = 4,639,594,721.64
  5. Step 5: Solve for x
    x = 4,639,594,721.64/78,588.52
  6. Step 6: Final answer
    x = 59,036.55

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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.