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Finding the Fourth Proportional to 66,784.30, 100,017.43 and 38,645.05

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Solution

The fourth proportional to 66,784.30, 100,017.43 and 38,645.05 is: 57,875.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,784.30 : 100,017.43 = 38,645.05 : x
  2. Step 2: Convert to fraction form
    66,784.30/100,017.43 = 38,645.05/x
  3. Step 3: Cross multiply
    66,784.30x = 100,017.43 × 38,645.05
  4. Step 4: Simplify right side
    66,784.30x = 3,865,178,641.48
  5. Step 5: Solve for x
    x = 3,865,178,641.48/66,784.30
  6. Step 6: Final answer
    x = 57,875.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.