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Finding the Fourth Proportional to 71,378.70, 98,504.55 and 39,551.10

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Solution

The fourth proportional to 71,378.70, 98,504.55 and 39,551.10 is: 54,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.70 : 98,504.55 = 39,551.10 : x
  2. Step 2: Convert to fraction form
    71,378.70/98,504.55 = 39,551.10/x
  3. Step 3: Cross multiply
    71,378.70x = 98,504.55 × 39,551.10
  4. Step 4: Simplify right side
    71,378.70x = 3,895,963,307.51
  5. Step 5: Solve for x
    x = 3,895,963,307.51/71,378.70
  6. Step 6: Final answer
    x = 54,581.60

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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.