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Finding the Fourth Proportional to 98,881.32, 136,480.64 and 56,464.46

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Solution

The fourth proportional to 98,881.32, 136,480.64 and 56,464.46 is: 77,934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,881.32 : 136,480.64 = 56,464.46 : x
  2. Step 2: Convert to fraction form
    98,881.32/136,480.64 = 56,464.46/x
  3. Step 3: Cross multiply
    98,881.32x = 136,480.64 × 56,464.46
  4. Step 4: Simplify right side
    98,881.32x = 7,706,304,673.33
  5. Step 5: Solve for x
    x = 7,706,304,673.33/98,881.32
  6. Step 6: Final answer
    x = 77,934.89

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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.