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Finding the Fourth Proportional to 154,386.70, 231,470.70 and 70,187.20

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Solution

The fourth proportional to 154,386.70, 231,470.70 and 70,187.20 is: 105,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,386.70 : 231,470.70 = 70,187.20 : x
  2. Step 2: Convert to fraction form
    154,386.70/231,470.70 = 70,187.20/x
  3. Step 3: Cross multiply
    154,386.70x = 231,470.70 × 70,187.20
  4. Step 4: Simplify right side
    154,386.70x = 16,246,280,315.04
  5. Step 5: Solve for x
    x = 16,246,280,315.04/154,386.70
  6. Step 6: Final answer
    x = 105,231.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.