Home / 137,787.86-190,134.85-80,432.16

Finding the Fourth Proportional to 137,787.86, 190,134.85 and 80,432.16

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Solution

The fourth proportional to 137,787.86, 190,134.85 and 80,432.16 is: 110,989.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,787.86 : 190,134.85 = 80,432.16 : x
  2. Step 2: Convert to fraction form
    137,787.86/190,134.85 = 80,432.16/x
  3. Step 3: Cross multiply
    137,787.86x = 190,134.85 × 80,432.16
  4. Step 4: Simplify right side
    137,787.86x = 15,292,956,676.78
  5. Step 5: Solve for x
    x = 15,292,956,676.78/137,787.86
  6. Step 6: Final answer
    x = 110,989.14

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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.