Home / 78,599.08-108,465.60-42,789.36

Finding the Fourth Proportional to 78,599.08, 108,465.60 and 42,789.36

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Solution

The fourth proportional to 78,599.08, 108,465.60 and 42,789.36 is: 59,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,599.08 : 108,465.60 = 42,789.36 : x
  2. Step 2: Convert to fraction form
    78,599.08/108,465.60 = 42,789.36/x
  3. Step 3: Cross multiply
    78,599.08x = 108,465.60 × 42,789.36
  4. Step 4: Simplify right side
    78,599.08x = 4,641,173,606.02
  5. Step 5: Solve for x
    x = 4,641,173,606.02/78,599.08
  6. Step 6: Final answer
    x = 59,048.70

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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.