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Finding the Fourth Proportional to 65,675.39, 90,628.29 and 38,820.38

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Solution

The fourth proportional to 65,675.39, 90,628.29 and 38,820.38 is: 53,569.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,675.39 : 90,628.29 = 38,820.38 : x
  2. Step 2: Convert to fraction form
    65,675.39/90,628.29 = 38,820.38/x
  3. Step 3: Cross multiply
    65,675.39x = 90,628.29 × 38,820.38
  4. Step 4: Simplify right side
    65,675.39x = 3,518,224,203.41
  5. Step 5: Solve for x
    x = 3,518,224,203.41/65,675.39
  6. Step 6: Final answer
    x = 53,569.91

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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.