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Finding the Fourth Proportional to 65,616.80, 90,551.16 and 35,808.80

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Solution

The fourth proportional to 65,616.80, 90,551.16 and 35,808.80 is: 49,416.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,616.80 : 90,551.16 = 35,808.80 : x
  2. Step 2: Convert to fraction form
    65,616.80/90,551.16 = 35,808.80/x
  3. Step 3: Cross multiply
    65,616.80x = 90,551.16 × 35,808.80
  4. Step 4: Simplify right side
    65,616.80x = 3,242,528,378.21
  5. Step 5: Solve for x
    x = 3,242,528,378.21/65,616.80
  6. Step 6: Final answer
    x = 49,416.13

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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.