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Finding the Fourth Proportional to 65,512.50, 90,315.66 and 55,400.34

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Solution

The fourth proportional to 65,512.50, 90,315.66 and 55,400.34 is: 76,375.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,512.50 : 90,315.66 = 55,400.34 : x
  2. Step 2: Convert to fraction form
    65,512.50/90,315.66 = 55,400.34/x
  3. Step 3: Cross multiply
    65,512.50x = 90,315.66 × 55,400.34
  4. Step 4: Simplify right side
    65,512.50x = 5,003,518,271.32
  5. Step 5: Solve for x
    x = 5,003,518,271.32/65,512.50
  6. Step 6: Final answer
    x = 76,375.02

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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.