Home / 218,787.40-301,929.06-128,123.56

Finding the Fourth Proportional to 218,787.40, 301,929.06 and 128,123.56

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Solution

The fourth proportional to 218,787.40, 301,929.06 and 128,123.56 is: 176,811.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,787.40 : 301,929.06 = 128,123.56 : x
  2. Step 2: Convert to fraction form
    218,787.40/301,929.06 = 128,123.56/x
  3. Step 3: Cross multiply
    218,787.40x = 301,929.06 × 128,123.56
  4. Step 4: Simplify right side
    218,787.40x = 38,684,226,034.65
  5. Step 5: Solve for x
    x = 38,684,226,034.65/218,787.40
  6. Step 6: Final answer
    x = 176,811.95

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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.