Home / 99,840.35-137,774.25-56,818.55

Finding the Fourth Proportional to 99,840.35, 137,774.25 and 56,818.55

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Solution

The fourth proportional to 99,840.35, 137,774.25 and 56,818.55 is: 78,406.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,840.35 : 137,774.25 = 56,818.55 : x
  2. Step 2: Convert to fraction form
    99,840.35/137,774.25 = 56,818.55/x
  3. Step 3: Cross multiply
    99,840.35x = 137,774.25 × 56,818.55
  4. Step 4: Simplify right side
    99,840.35x = 7,828,133,456.77
  5. Step 5: Solve for x
    x = 7,828,133,456.77/99,840.35
  6. Step 6: Final answer
    x = 78,406.51

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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.