Home / 88,721.76-122,436.30-56,890.78

Finding the Fourth Proportional to 88,721.76, 122,436.30 and 56,890.78

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Solution

The fourth proportional to 88,721.76, 122,436.30 and 56,890.78 is: 78,509.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,721.76 : 122,436.30 = 56,890.78 : x
  2. Step 2: Convert to fraction form
    88,721.76/122,436.30 = 56,890.78/x
  3. Step 3: Cross multiply
    88,721.76x = 122,436.30 × 56,890.78
  4. Step 4: Simplify right side
    88,721.76x = 6,965,496,607.31
  5. Step 5: Solve for x
    x = 6,965,496,607.31/88,721.76
  6. Step 6: Final answer
    x = 78,509.45

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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.