Home / 112,432.26-154,893.06-78,378.87

Finding the Fourth Proportional to 112,432.26, 154,893.06 and 78,378.87

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Solution

The fourth proportional to 112,432.26, 154,893.06 and 78,378.87 is: 107,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,432.26 : 154,893.06 = 78,378.87 : x
  2. Step 2: Convert to fraction form
    112,432.26/154,893.06 = 78,378.87/x
  3. Step 3: Cross multiply
    112,432.26x = 154,893.06 × 78,378.87
  4. Step 4: Simplify right side
    112,432.26x = 12,140,343,013.64
  5. Step 5: Solve for x
    x = 12,140,343,013.64/112,432.26
  6. Step 6: Final answer
    x = 107,979.18

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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.