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Finding the Fourth Proportional to 98,792, 136,332.96 and 54,080

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Solution

The fourth proportional to 98,792, 136,332.96 and 54,080 is: 74,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,792 : 136,332.96 = 54,080 : x
  2. Step 2: Convert to fraction form
    98,792/136,332.96 = 54,080/x
  3. Step 3: Cross multiply
    98,792x = 136,332.96 × 54,080
  4. Step 4: Simplify right side
    98,792x = 7,372,886,476.80
  5. Step 5: Solve for x
    x = 7,372,886,476.80/98,792
  6. Step 6: Final answer
    x = 74,630.40

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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.