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Finding the Fourth Proportional to 71,506.70, 98,679.28 and 39,675.64

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Solution

The fourth proportional to 71,506.70, 98,679.28 and 39,675.64 is: 54,752.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,506.70 : 98,679.28 = 39,675.64 : x
  2. Step 2: Convert to fraction form
    71,506.70/98,679.28 = 39,675.64/x
  3. Step 3: Cross multiply
    71,506.70x = 98,679.28 × 39,675.64
  4. Step 4: Simplify right side
    71,506.70x = 3,915,163,588.74
  5. Step 5: Solve for x
    x = 3,915,163,588.74/71,506.70
  6. Step 6: Final answer
    x = 54,752.40

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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.