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Finding the Fourth Proportional to 61,931.79, 92,800.89 and 45,215.01

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Solution

The fourth proportional to 61,931.79, 92,800.89 and 45,215.01 is: 67,751.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,931.79 : 92,800.89 = 45,215.01 : x
  2. Step 2: Convert to fraction form
    61,931.79/92,800.89 = 45,215.01/x
  3. Step 3: Cross multiply
    61,931.79x = 92,800.89 × 45,215.01
  4. Step 4: Simplify right side
    61,931.79x = 4,195,993,169.36
  5. Step 5: Solve for x
    x = 4,195,993,169.36/61,931.79
  6. Step 6: Final answer
    x = 67,751.85

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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.