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Finding the Fourth Proportional to 76,376.16, 114,566.16 and 20,972

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Solution

The fourth proportional to 76,376.16, 114,566.16 and 20,972 is: 31,458.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,376.16 : 114,566.16 = 20,972 : x
  2. Step 2: Convert to fraction form
    76,376.16/114,566.16 = 20,972/x
  3. Step 3: Cross multiply
    76,376.16x = 114,566.16 × 20,972
  4. Step 4: Simplify right side
    76,376.16x = 2,402,681,507.52
  5. Step 5: Solve for x
    x = 2,402,681,507.52/76,376.16
  6. Step 6: Final answer
    x = 31,458.53

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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.