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Finding the Fourth Proportional to 96,810.84, 145,128.78 and 67,242.60

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Solution

The fourth proportional to 96,810.84, 145,128.78 and 67,242.60 is: 100,803.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,810.84 : 145,128.78 = 67,242.60 : x
  2. Step 2: Convert to fraction form
    96,810.84/145,128.78 = 67,242.60/x
  3. Step 3: Cross multiply
    96,810.84x = 145,128.78 × 67,242.60
  4. Step 4: Simplify right side
    96,810.84x = 9,758,836,502.03
  5. Step 5: Solve for x
    x = 9,758,836,502.03/96,810.84
  6. Step 6: Final answer
    x = 100,803.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.