Home / 128,144.25-176,838.36-70,787.52

Finding the Fourth Proportional to 128,144.25, 176,838.36 and 70,787.52

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Solution

The fourth proportional to 128,144.25, 176,838.36 and 70,787.52 is: 97,686.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.25 : 176,838.36 = 70,787.52 : x
  2. Step 2: Convert to fraction form
    128,144.25/176,838.36 = 70,787.52/x
  3. Step 3: Cross multiply
    128,144.25x = 176,838.36 × 70,787.52
  4. Step 4: Simplify right side
    128,144.25x = 12,517,948,248.94
  5. Step 5: Solve for x
    x = 12,517,948,248.94/128,144.25
  6. Step 6: Final answer
    x = 97,686.38

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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.