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Finding the Fourth Proportional to 65,465.49, 90,350.81 and 39,966.51

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Solution

The fourth proportional to 65,465.49, 90,350.81 and 39,966.51 is: 55,158.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,465.49 : 90,350.81 = 39,966.51 : x
  2. Step 2: Convert to fraction form
    65,465.49/90,350.81 = 39,966.51/x
  3. Step 3: Cross multiply
    65,465.49x = 90,350.81 × 39,966.51
  4. Step 4: Simplify right side
    65,465.49x = 3,611,006,351.54
  5. Step 5: Solve for x
    x = 3,611,006,351.54/65,465.49
  6. Step 6: Final answer
    x = 55,158.93

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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.