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Finding the Fourth Proportional to 154,330.70, 231,386.70 and 70,131.20

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Solution

The fourth proportional to 154,330.70, 231,386.70 and 70,131.20 is: 105,147.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,330.70 : 231,386.70 = 70,131.20 : x
  2. Step 2: Convert to fraction form
    154,330.70/231,386.70 = 70,131.20/x
  3. Step 3: Cross multiply
    154,330.70x = 231,386.70 × 70,131.20
  4. Step 4: Simplify right side
    154,330.70x = 16,227,426,935.04
  5. Step 5: Solve for x
    x = 16,227,426,935.04/154,330.70
  6. Step 6: Final answer
    x = 105,147.11

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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.