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Finding the Fourth Proportional to 71,487.44, 98,664.48 and 39,666.59

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Solution

The fourth proportional to 71,487.44, 98,664.48 and 39,666.59 is: 54,746.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,487.44 : 98,664.48 = 39,666.59 : x
  2. Step 2: Convert to fraction form
    71,487.44/98,664.48 = 39,666.59/x
  3. Step 3: Cross multiply
    71,487.44x = 98,664.48 × 39,666.59
  4. Step 4: Simplify right side
    71,487.44x = 3,913,683,475.72
  5. Step 5: Solve for x
    x = 3,913,683,475.72/71,487.44
  6. Step 6: Final answer
    x = 54,746.45

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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.