Home / 78,701.40-108,604.77-42,890.64

Finding the Fourth Proportional to 78,701.40, 108,604.77 and 42,890.64

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Solution

The fourth proportional to 78,701.40, 108,604.77 and 42,890.64 is: 59,187.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,701.40 : 108,604.77 = 42,890.64 : x
  2. Step 2: Convert to fraction form
    78,701.40/108,604.77 = 42,890.64/x
  3. Step 3: Cross multiply
    78,701.40x = 108,604.77 × 42,890.64
  4. Step 4: Simplify right side
    78,701.40x = 4,658,127,524.25
  5. Step 5: Solve for x
    x = 4,658,127,524.25/78,701.40
  6. Step 6: Final answer
    x = 59,187.35

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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.