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Finding the Fourth Proportional to 65,885.40, 90,921.90 and 35,670.74

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Solution

The fourth proportional to 65,885.40, 90,921.90 and 35,670.74 is: 49,225.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,885.40 : 90,921.90 = 35,670.74 : x
  2. Step 2: Convert to fraction form
    65,885.40/90,921.90 = 35,670.74/x
  3. Step 3: Cross multiply
    65,885.40x = 90,921.90 × 35,670.74
  4. Step 4: Simplify right side
    65,885.40x = 3,243,251,455.21
  5. Step 5: Solve for x
    x = 3,243,251,455.21/65,885.40
  6. Step 6: Final answer
    x = 49,225.65

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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.