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Finding the Fourth Proportional to 71,445.68, 98,594.64 and 39,619.28

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Solution

The fourth proportional to 71,445.68, 98,594.64 and 39,619.28 is: 54,674.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,445.68 : 98,594.64 = 39,619.28 : x
  2. Step 2: Convert to fraction form
    71,445.68/98,594.64 = 39,619.28/x
  3. Step 3: Cross multiply
    71,445.68x = 98,594.64 × 39,619.28
  4. Step 4: Simplify right side
    71,445.68x = 3,906,248,648.66
  5. Step 5: Solve for x
    x = 3,906,248,648.66/71,445.68
  6. Step 6: Final answer
    x = 54,674.39

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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.