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Finding the Fourth Proportional to 65,731.93, 90,728.64 and 38,883.77

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Solution

The fourth proportional to 65,731.93, 90,728.64 and 38,883.77 is: 53,670.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,731.93 : 90,728.64 = 38,883.77 : x
  2. Step 2: Convert to fraction form
    65,731.93/90,728.64 = 38,883.77/x
  3. Step 3: Cross multiply
    65,731.93x = 90,728.64 × 38,883.77
  4. Step 4: Simplify right side
    65,731.93x = 3,527,871,570.17
  5. Step 5: Solve for x
    x = 3,527,871,570.17/65,731.93
  6. Step 6: Final answer
    x = 53,670.59

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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.