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Finding the Fourth Proportional to 71,502, 98,669.40 and 39,235.89

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Solution

The fourth proportional to 71,502, 98,669.40 and 39,235.89 is: 54,143.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,502 : 98,669.40 = 39,235.89 : x
  2. Step 2: Convert to fraction form
    71,502/98,669.40 = 39,235.89/x
  3. Step 3: Cross multiply
    71,502x = 98,669.40 × 39,235.89
  4. Step 4: Simplify right side
    71,502x = 3,871,381,724.77
  5. Step 5: Solve for x
    x = 3,871,381,724.77/71,502
  6. Step 6: Final answer
    x = 54,143.68

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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.