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Finding the Fourth Proportional to 65,370.42, 90,230.22 and 42,712.86

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Solution

The fourth proportional to 65,370.42, 90,230.22 and 42,712.86 is: 58,956.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,370.42 : 90,230.22 = 42,712.86 : x
  2. Step 2: Convert to fraction form
    65,370.42/90,230.22 = 42,712.86/x
  3. Step 3: Cross multiply
    65,370.42x = 90,230.22 × 42,712.86
  4. Step 4: Simplify right side
    65,370.42x = 3,853,990,754.63
  5. Step 5: Solve for x
    x = 3,853,990,754.63/65,370.42
  6. Step 6: Final answer
    x = 58,956.19

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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.