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Finding the Fourth Proportional to 61,913.80, 92,870.70 and 57,977.20

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Solution

The fourth proportional to 61,913.80, 92,870.70 and 57,977.20 is: 86,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,913.80 : 92,870.70 = 57,977.20 : x
  2. Step 2: Convert to fraction form
    61,913.80/92,870.70 = 57,977.20/x
  3. Step 3: Cross multiply
    61,913.80x = 92,870.70 × 57,977.20
  4. Step 4: Simplify right side
    61,913.80x = 5,384,383,148.04
  5. Step 5: Solve for x
    x = 5,384,383,148.04/61,913.80
  6. Step 6: Final answer
    x = 86,965.80

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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.