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Finding the Fourth Proportional to 70,391.32, 105,512.82 and 25,989.64

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Solution

The fourth proportional to 70,391.32, 105,512.82 and 25,989.64 is: 38,957.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.32 : 105,512.82 = 25,989.64 : x
  2. Step 2: Convert to fraction form
    70,391.32/105,512.82 = 25,989.64/x
  3. Step 3: Cross multiply
    70,391.32x = 105,512.82 × 25,989.64
  4. Step 4: Simplify right side
    70,391.32x = 2,742,240,207.18
  5. Step 5: Solve for x
    x = 2,742,240,207.18/70,391.32
  6. Step 6: Final answer
    x = 38,957.08

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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.