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Finding the Fourth Proportional to 70,135.68, 96,796.40 and 39,915.12

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Solution

The fourth proportional to 70,135.68, 96,796.40 and 39,915.12 is: 55,088.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,135.68 : 96,796.40 = 39,915.12 : x
  2. Step 2: Convert to fraction form
    70,135.68/96,796.40 = 39,915.12/x
  3. Step 3: Cross multiply
    70,135.68x = 96,796.40 × 39,915.12
  4. Step 4: Simplify right side
    70,135.68x = 3,863,639,921.57
  5. Step 5: Solve for x
    x = 3,863,639,921.57/70,135.68
  6. Step 6: Final answer
    x = 55,088.08

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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.