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Finding the Fourth Proportional to 65,465.74, 90,351.15 and 39,966.76

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Solution

The fourth proportional to 65,465.74, 90,351.15 and 39,966.76 is: 55,159.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,465.74 : 90,351.15 = 39,966.76 : x
  2. Step 2: Convert to fraction form
    65,465.74/90,351.15 = 39,966.76/x
  3. Step 3: Cross multiply
    65,465.74x = 90,351.15 × 39,966.76
  4. Step 4: Simplify right side
    65,465.74x = 3,611,042,727.77
  5. Step 5: Solve for x
    x = 3,611,042,727.77/65,465.74
  6. Step 6: Final answer
    x = 55,159.27

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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.