Home / 78,587.07-108,452.25-42,779.49

Finding the Fourth Proportional to 78,587.07, 108,452.25 and 42,779.49

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Solution

The fourth proportional to 78,587.07, 108,452.25 and 42,779.49 is: 59,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.07 : 108,452.25 = 42,779.49 : x
  2. Step 2: Convert to fraction form
    78,587.07/108,452.25 = 42,779.49/x
  3. Step 3: Cross multiply
    78,587.07x = 108,452.25 × 42,779.49
  4. Step 4: Simplify right side
    78,587.07x = 4,639,531,944.35
  5. Step 5: Solve for x
    x = 4,639,531,944.35/78,587.07
  6. Step 6: Final answer
    x = 59,036.84

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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.