Home / 78,478.16-108,309.20-46,647.18

Finding the Fourth Proportional to 78,478.16, 108,309.20 and 46,647.18

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Solution

The fourth proportional to 78,478.16, 108,309.20 and 46,647.18 is: 64,378.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,478.16 : 108,309.20 = 46,647.18 : x
  2. Step 2: Convert to fraction form
    78,478.16/108,309.20 = 46,647.18/x
  3. Step 3: Cross multiply
    78,478.16x = 108,309.20 × 46,647.18
  4. Step 4: Simplify right side
    78,478.16x = 5,052,318,514.82
  5. Step 5: Solve for x
    x = 5,052,318,514.82/78,478.16
  6. Step 6: Final answer
    x = 64,378.66

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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.