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Finding the Fourth Proportional to 65,326.84, 90,152.80 and 38,464.40

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Solution

The fourth proportional to 65,326.84, 90,152.80 and 38,464.40 is: 53,081.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,326.84 : 90,152.80 = 38,464.40 : x
  2. Step 2: Convert to fraction form
    65,326.84/90,152.80 = 38,464.40/x
  3. Step 3: Cross multiply
    65,326.84x = 90,152.80 × 38,464.40
  4. Step 4: Simplify right side
    65,326.84x = 3,467,673,489.54
  5. Step 5: Solve for x
    x = 3,467,673,489.54/65,326.84
  6. Step 6: Final answer
    x = 53,081.91

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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.