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Finding the Fourth Proportional to 131,355.66, 181,271.97 and 74,770.68

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Solution

The fourth proportional to 131,355.66, 181,271.97 and 74,770.68 is: 103,184.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,355.66 : 181,271.97 = 74,770.68 : x
  2. Step 2: Convert to fraction form
    131,355.66/181,271.97 = 74,770.68/x
  3. Step 3: Cross multiply
    131,355.66x = 181,271.97 × 74,770.68
  4. Step 4: Simplify right side
    131,355.66x = 13,553,828,461.84
  5. Step 5: Solve for x
    x = 13,553,828,461.84/131,355.66
  6. Step 6: Final answer
    x = 103,184.20

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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.