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Finding the Fourth Proportional to 131,870.73, 181,980.63 and 75,281.97

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Solution

The fourth proportional to 131,870.73, 181,980.63 and 75,281.97 is: 103,888.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,870.73 : 181,980.63 = 75,281.97 : x
  2. Step 2: Convert to fraction form
    131,870.73/181,980.63 = 75,281.97/x
  3. Step 3: Cross multiply
    131,870.73x = 181,980.63 × 75,281.97
  4. Step 4: Simplify right side
    131,870.73x = 13,699,860,328.24
  5. Step 5: Solve for x
    x = 13,699,860,328.24/131,870.73
  6. Step 6: Final answer
    x = 103,888.56

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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.