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Finding the Fourth Proportional to 65,710.80, 90,690.30 and 37,419.12

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Solution

The fourth proportional to 65,710.80, 90,690.30 and 37,419.12 is: 51,643.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,710.80 : 90,690.30 = 37,419.12 : x
  2. Step 2: Convert to fraction form
    65,710.80/90,690.30 = 37,419.12/x
  3. Step 3: Cross multiply
    65,710.80x = 90,690.30 × 37,419.12
  4. Step 4: Simplify right side
    65,710.80x = 3,393,551,218.54
  5. Step 5: Solve for x
    x = 3,393,551,218.54/65,710.80
  6. Step 6: Final answer
    x = 51,643.74

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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.