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Finding the Fourth Proportional to 239,381.40, 358,985.70 and 121,013.40

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Solution

The fourth proportional to 239,381.40, 358,985.70 and 121,013.40 is: 181,476.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,381.40 : 358,985.70 = 121,013.40 : x
  2. Step 2: Convert to fraction form
    239,381.40/358,985.70 = 121,013.40/x
  3. Step 3: Cross multiply
    239,381.40x = 358,985.70 × 121,013.40
  4. Step 4: Simplify right side
    239,381.40x = 43,442,080,108.38
  5. Step 5: Solve for x
    x = 43,442,080,108.38/239,381.40
  6. Step 6: Final answer
    x = 181,476.42

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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.