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Finding the Fourth Proportional to 65,398.21, 90,252.49 and 38,541.85

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Solution

The fourth proportional to 65,398.21, 90,252.49 and 38,541.85 is: 53,189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.21 : 90,252.49 = 38,541.85 : x
  2. Step 2: Convert to fraction form
    65,398.21/90,252.49 = 38,541.85/x
  3. Step 3: Cross multiply
    65,398.21x = 90,252.49 × 38,541.85
  4. Step 4: Simplify right side
    65,398.21x = 3,478,497,931.71
  5. Step 5: Solve for x
    x = 3,478,497,931.71/65,398.21
  6. Step 6: Final answer
    x = 53,189.50

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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.