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Finding the Fourth Proportional to 65,860.40, 90,904.92 and 40,695.68

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Solution

The fourth proportional to 65,860.40, 90,904.92 and 40,695.68 is: 56,170.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,860.40 : 90,904.92 = 40,695.68 : x
  2. Step 2: Convert to fraction form
    65,860.40/90,904.92 = 40,695.68/x
  3. Step 3: Cross multiply
    65,860.40x = 90,904.92 × 40,695.68
  4. Step 4: Simplify right side
    65,860.40x = 3,699,437,534.75
  5. Step 5: Solve for x
    x = 3,699,437,534.75/65,860.40
  6. Step 6: Final answer
    x = 56,170.89

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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.