Home / 99,418.16-137,200.30-56,984.70

Finding the Fourth Proportional to 99,418.16, 137,200.30 and 56,984.70

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Solution

The fourth proportional to 99,418.16, 137,200.30 and 56,984.70 is: 78,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,418.16 : 137,200.30 = 56,984.70 : x
  2. Step 2: Convert to fraction form
    99,418.16/137,200.30 = 56,984.70/x
  3. Step 3: Cross multiply
    99,418.16x = 137,200.30 × 56,984.70
  4. Step 4: Simplify right side
    99,418.16x = 7,818,317,935.41
  5. Step 5: Solve for x
    x = 7,818,317,935.41/99,418.16
  6. Step 6: Final answer
    x = 78,640.74

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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.