Home / 78,028.60-107,667.92-47,385.76

Finding the Fourth Proportional to 78,028.60, 107,667.92 and 47,385.76

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Solution

The fourth proportional to 78,028.60, 107,667.92 and 47,385.76 is: 65,385.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,028.60 : 107,667.92 = 47,385.76 : x
  2. Step 2: Convert to fraction form
    78,028.60/107,667.92 = 47,385.76/x
  3. Step 3: Cross multiply
    78,028.60x = 107,667.92 × 47,385.76
  4. Step 4: Simplify right side
    78,028.60x = 5,101,925,547.22
  5. Step 5: Solve for x
    x = 5,101,925,547.22/78,028.60
  6. Step 6: Final answer
    x = 65,385.33

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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.