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Finding the Fourth Proportional to 78,405.91, 108,192.35 and 44,407.61

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Solution

The fourth proportional to 78,405.91, 108,192.35 and 44,407.61 is: 61,278.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,405.91 : 108,192.35 = 44,407.61 : x
  2. Step 2: Convert to fraction form
    78,405.91/108,192.35 = 44,407.61/x
  3. Step 3: Cross multiply
    78,405.91x = 108,192.35 × 44,407.61
  4. Step 4: Simplify right side
    78,405.91x = 4,804,563,843.25
  5. Step 5: Solve for x
    x = 4,804,563,843.25/78,405.91
  6. Step 6: Final answer
    x = 61,278.08

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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.