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Finding the Fourth Proportional to 115,424.33, 159,281.43 and 72,426.98

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Solution

The fourth proportional to 115,424.33, 159,281.43 and 72,426.98 is: 99,946.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,424.33 : 159,281.43 = 72,426.98 : x
  2. Step 2: Convert to fraction form
    115,424.33/159,281.43 = 72,426.98/x
  3. Step 3: Cross multiply
    115,424.33x = 159,281.43 × 72,426.98
  4. Step 4: Simplify right side
    115,424.33x = 11,536,272,148.57
  5. Step 5: Solve for x
    x = 11,536,272,148.57/115,424.33
  6. Step 6: Final answer
    x = 99,946.63

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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.