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Finding the Fourth Proportional to 70,991.32, 97,964.48 and 39,159.40

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Solution

The fourth proportional to 70,991.32, 97,964.48 and 39,159.40 is: 54,038.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,991.32 : 97,964.48 = 39,159.40 : x
  2. Step 2: Convert to fraction form
    70,991.32/97,964.48 = 39,159.40/x
  3. Step 3: Cross multiply
    70,991.32x = 97,964.48 × 39,159.40
  4. Step 4: Simplify right side
    70,991.32x = 3,836,230,258.11
  5. Step 5: Solve for x
    x = 3,836,230,258.11/70,991.32
  6. Step 6: Final answer
    x = 54,038.02

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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.