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Finding the Fourth Proportional to 65,655.72, 90,478.49 and 47,722.32

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Solution

The fourth proportional to 65,655.72, 90,478.49 and 47,722.32 is: 65,764.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,655.72 : 90,478.49 = 47,722.32 : x
  2. Step 2: Convert to fraction form
    65,655.72/90,478.49 = 47,722.32/x
  3. Step 3: Cross multiply
    65,655.72x = 90,478.49 × 47,722.32
  4. Step 4: Simplify right side
    65,655.72x = 4,317,843,214.29
  5. Step 5: Solve for x
    x = 4,317,843,214.29/65,655.72
  6. Step 6: Final answer
    x = 65,764.92

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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.