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Finding the Fourth Proportional to 65,707.80, 90,686.16 and 37,416.12

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Solution

The fourth proportional to 65,707.80, 90,686.16 and 37,416.12 is: 51,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,707.80 : 90,686.16 = 37,416.12 : x
  2. Step 2: Convert to fraction form
    65,707.80/90,686.16 = 37,416.12/x
  3. Step 3: Cross multiply
    65,707.80x = 90,686.16 × 37,416.12
  4. Step 4: Simplify right side
    65,707.80x = 3,393,124,244.90
  5. Step 5: Solve for x
    x = 3,393,124,244.90/65,707.80
  6. Step 6: Final answer
    x = 51,639.60

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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.