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Finding the Fourth Proportional to 65,745.45, 90,728.51 and 37,455.93

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Solution

The fourth proportional to 65,745.45, 90,728.51 and 37,455.93 is: 51,689.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,745.45 : 90,728.51 = 37,455.93 : x
  2. Step 2: Convert to fraction form
    65,745.45/90,728.51 = 37,455.93/x
  3. Step 3: Cross multiply
    65,745.45x = 90,728.51 × 37,455.93
  4. Step 4: Simplify right side
    65,745.45x = 3,398,320,532.28
  5. Step 5: Solve for x
    x = 3,398,320,532.28/65,745.45
  6. Step 6: Final answer
    x = 51,689.06

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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.