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Finding the Fourth Proportional to 71,630.88, 98,852.40 and 39,802.80

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Solution

The fourth proportional to 71,630.88, 98,852.40 and 39,802.80 is: 54,928.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,630.88 : 98,852.40 = 39,802.80 : x
  2. Step 2: Convert to fraction form
    71,630.88/98,852.40 = 39,802.80/x
  3. Step 3: Cross multiply
    71,630.88x = 98,852.40 × 39,802.80
  4. Step 4: Simplify right side
    71,630.88x = 3,934,602,306.72
  5. Step 5: Solve for x
    x = 3,934,602,306.72/71,630.88
  6. Step 6: Final answer
    x = 54,928.86

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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.