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Finding the Fourth Proportional to 65,525.90, 90,445.19 and 42,555.10

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Solution

The fourth proportional to 65,525.90, 90,445.19 and 42,555.10 is: 58,738.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,525.90 : 90,445.19 = 42,555.10 : x
  2. Step 2: Convert to fraction form
    65,525.90/90,445.19 = 42,555.10/x
  3. Step 3: Cross multiply
    65,525.90x = 90,445.19 × 42,555.10
  4. Step 4: Simplify right side
    65,525.90x = 3,848,904,104.97
  5. Step 5: Solve for x
    x = 3,848,904,104.97/65,525.90
  6. Step 6: Final answer
    x = 58,738.67

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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.