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Finding the Fourth Proportional to 72,107.70, 99,368.04 and 51,926.45

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Solution

The fourth proportional to 72,107.70, 99,368.04 and 51,926.45 is: 71,557.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,107.70 : 99,368.04 = 51,926.45 : x
  2. Step 2: Convert to fraction form
    72,107.70/99,368.04 = 51,926.45/x
  3. Step 3: Cross multiply
    72,107.70x = 99,368.04 × 51,926.45
  4. Step 4: Simplify right side
    72,107.70x = 5,159,829,063.82
  5. Step 5: Solve for x
    x = 5,159,829,063.82/72,107.70
  6. Step 6: Final answer
    x = 71,557.25

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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.