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Finding the Fourth Proportional to 65,877.16, 90,911.94 and 39,019.24

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Solution

The fourth proportional to 65,877.16, 90,911.94 and 39,019.24 is: 53,847.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,877.16 : 90,911.94 = 39,019.24 : x
  2. Step 2: Convert to fraction form
    65,877.16/90,911.94 = 39,019.24/x
  3. Step 3: Cross multiply
    65,877.16x = 90,911.94 × 39,019.24
  4. Step 4: Simplify right side
    65,877.16x = 3,547,314,805.73
  5. Step 5: Solve for x
    x = 3,547,314,805.73/65,877.16
  6. Step 6: Final answer
    x = 53,847.42

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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.