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Finding the Fourth Proportional to 71,680.16, 98,916.84 and 39,848.84

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Solution

The fourth proportional to 71,680.16, 98,916.84 and 39,848.84 is: 54,990.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,680.16 : 98,916.84 = 39,848.84 : x
  2. Step 2: Convert to fraction form
    71,680.16/98,916.84 = 39,848.84/x
  3. Step 3: Cross multiply
    71,680.16x = 98,916.84 × 39,848.84
  4. Step 4: Simplify right side
    71,680.16x = 3,941,721,330.47
  5. Step 5: Solve for x
    x = 3,941,721,330.47/71,680.16
  6. Step 6: Final answer
    x = 54,990.41

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1.5x scale

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.