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Finding the Fourth Proportional to 71,189.60, 98,239.92 and 39,357.68

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Solution

The fourth proportional to 71,189.60, 98,239.92 and 39,357.68 is: 54,312.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,189.60 : 98,239.92 = 39,357.68 : x
  2. Step 2: Convert to fraction form
    71,189.60/98,239.92 = 39,357.68/x
  3. Step 3: Cross multiply
    71,189.60x = 98,239.92 × 39,357.68
  4. Step 4: Simplify right side
    71,189.60x = 3,866,495,334.59
  5. Step 5: Solve for x
    x = 3,866,495,334.59/71,189.60
  6. Step 6: Final answer
    x = 54,312.64

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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.