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Finding the Fourth Proportional to 61,391.88, 91,639.62 and 52,682.76

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Solution

The fourth proportional to 61,391.88, 91,639.62 and 52,682.76 is: 78,639.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,391.88 : 91,639.62 = 52,682.76 : x
  2. Step 2: Convert to fraction form
    61,391.88/91,639.62 = 52,682.76/x
  3. Step 3: Cross multiply
    61,391.88x = 91,639.62 × 52,682.76
  4. Step 4: Simplify right side
    61,391.88x = 4,827,828,106.95
  5. Step 5: Solve for x
    x = 4,827,828,106.95/61,391.88
  6. Step 6: Final answer
    x = 78,639.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.