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Finding the Fourth Proportional to 65,689.74, 90,659.07 and 37,390.86

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Solution

The fourth proportional to 65,689.74, 90,659.07 and 37,390.86 is: 51,603.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,689.74 : 90,659.07 = 37,390.86 : x
  2. Step 2: Convert to fraction form
    65,689.74/90,659.07 = 37,390.86/x
  3. Step 3: Cross multiply
    65,689.74x = 90,659.07 × 37,390.86
  4. Step 4: Simplify right side
    65,689.74x = 3,389,820,594.10
  5. Step 5: Solve for x
    x = 3,389,820,594.10/65,689.74
  6. Step 6: Final answer
    x = 51,603.50

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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.