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Finding the Fourth Proportional to 70,820.57, 106,248.02 and 20,899.57

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Solution

The fourth proportional to 70,820.57, 106,248.02 and 20,899.57 is: 31,354.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,820.57 : 106,248.02 = 20,899.57 : x
  2. Step 2: Convert to fraction form
    70,820.57/106,248.02 = 20,899.57/x
  3. Step 3: Cross multiply
    70,820.57x = 106,248.02 × 20,899.57
  4. Step 4: Simplify right side
    70,820.57x = 2,220,537,400.11
  5. Step 5: Solve for x
    x = 2,220,537,400.11/70,820.57
  6. Step 6: Final answer
    x = 31,354.41

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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.