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Finding the Fourth Proportional to 70,885.80, 106,328.70 and 35,820.90

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Solution

The fourth proportional to 70,885.80, 106,328.70 and 35,820.90 is: 53,731.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,885.80 : 106,328.70 = 35,820.90 : x
  2. Step 2: Convert to fraction form
    70,885.80/106,328.70 = 35,820.90/x
  3. Step 3: Cross multiply
    70,885.80x = 106,328.70 × 35,820.90
  4. Step 4: Simplify right side
    70,885.80x = 3,808,789,729.83
  5. Step 5: Solve for x
    x = 3,808,789,729.83/70,885.80
  6. Step 6: Final answer
    x = 53,731.35

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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.