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Finding the Fourth Proportional to 70,351.95, 105,533.43 and 20,432.88

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Solution

The fourth proportional to 70,351.95, 105,533.43 and 20,432.88 is: 30,650.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,351.95 : 105,533.43 = 20,432.88 : x
  2. Step 2: Convert to fraction form
    70,351.95/105,533.43 = 20,432.88/x
  3. Step 3: Cross multiply
    70,351.95x = 105,533.43 × 20,432.88
  4. Step 4: Simplify right side
    70,351.95x = 2,156,351,911.18
  5. Step 5: Solve for x
    x = 2,156,351,911.18/70,351.95
  6. Step 6: Final answer
    x = 30,650.92

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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.