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Finding the Fourth Proportional to 181,871.70, 272,807.55 and 103,139.70

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Solution

The fourth proportional to 181,871.70, 272,807.55 and 103,139.70 is: 154,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,871.70 : 272,807.55 = 103,139.70 : x
  2. Step 2: Convert to fraction form
    181,871.70/272,807.55 = 103,139.70/x
  3. Step 3: Cross multiply
    181,871.70x = 272,807.55 × 103,139.70
  4. Step 4: Simplify right side
    181,871.70x = 28,137,288,864.74
  5. Step 5: Solve for x
    x = 28,137,288,864.74/181,871.70
  6. Step 6: Final answer
    x = 154,709.55

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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.