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Finding the Fourth Proportional to 65,700.61, 90,673.93 and 40,224.12

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Solution

The fourth proportional to 65,700.61, 90,673.93 and 40,224.12 is: 55,513.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,700.61 : 90,673.93 = 40,224.12 : x
  2. Step 2: Convert to fraction form
    65,700.61/90,673.93 = 40,224.12/x
  3. Step 3: Cross multiply
    65,700.61x = 90,673.93 × 40,224.12
  4. Step 4: Simplify right side
    65,700.61x = 3,647,279,041.19
  5. Step 5: Solve for x
    x = 3,647,279,041.19/65,700.61
  6. Step 6: Final answer
    x = 55,513.63

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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.