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Finding the Fourth Proportional to 98,880.82, 136,479.95 and 56,463.96

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Solution

The fourth proportional to 98,880.82, 136,479.95 and 56,463.96 is: 77,934.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,880.82 : 136,479.95 = 56,463.96 : x
  2. Step 2: Convert to fraction form
    98,880.82/136,479.95 = 56,463.96/x
  3. Step 3: Cross multiply
    98,880.82x = 136,479.95 × 56,463.96
  4. Step 4: Simplify right side
    98,880.82x = 7,706,198,437.60
  5. Step 5: Solve for x
    x = 7,706,198,437.60/98,880.82
  6. Step 6: Final answer
    x = 77,934.21

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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.