Home / 128,143.89-176,837.86-70,787.15

Finding the Fourth Proportional to 128,143.89, 176,837.86 and 70,787.15

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Solution

The fourth proportional to 128,143.89, 176,837.86 and 70,787.15 is: 97,685.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,143.89 : 176,837.86 = 70,787.15 : x
  2. Step 2: Convert to fraction form
    128,143.89/176,837.86 = 70,787.15/x
  3. Step 3: Cross multiply
    128,143.89x = 176,837.86 × 70,787.15
  4. Step 4: Simplify right side
    128,143.89x = 12,517,848,535.88
  5. Step 5: Solve for x
    x = 12,517,848,535.88/128,143.89
  6. Step 6: Final answer
    x = 97,685.88

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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.