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Finding the Fourth Proportional to 131,592, 181,598.40 and 71,976

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Solution

The fourth proportional to 131,592, 181,598.40 and 71,976 is: 99,327.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,592 : 181,598.40 = 71,976 : x
  2. Step 2: Convert to fraction form
    131,592/181,598.40 = 71,976/x
  3. Step 3: Cross multiply
    131,592x = 181,598.40 × 71,976
  4. Step 4: Simplify right side
    131,592x = 13,070,726,438.40
  5. Step 5: Solve for x
    x = 13,070,726,438.40/131,592
  6. Step 6: Final answer
    x = 99,327.67

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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.