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Finding the Fourth Proportional to 65,038.72, 89,751.60 and 38,180.80

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Solution

The fourth proportional to 65,038.72, 89,751.60 and 38,180.80 is: 52,688.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,038.72 : 89,751.60 = 38,180.80 : x
  2. Step 2: Convert to fraction form
    65,038.72/89,751.60 = 38,180.80/x
  3. Step 3: Cross multiply
    65,038.72x = 89,751.60 × 38,180.80
  4. Step 4: Simplify right side
    65,038.72x = 3,426,787,889.28
  5. Step 5: Solve for x
    x = 3,426,787,889.28/65,038.72
  6. Step 6: Final answer
    x = 52,688.43

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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.