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Finding the Fourth Proportional to 210,158.60, 315,266.70 and 69,902.60

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Solution

The fourth proportional to 210,158.60, 315,266.70 and 69,902.60 is: 104,863.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,158.60 : 315,266.70 = 69,902.60 : x
  2. Step 2: Convert to fraction form
    210,158.60/315,266.70 = 69,902.60/x
  3. Step 3: Cross multiply
    210,158.60x = 315,266.70 × 69,902.60
  4. Step 4: Simplify right side
    210,158.60x = 22,037,962,023.42
  5. Step 5: Solve for x
    x = 22,037,962,023.42/210,158.60
  6. Step 6: Final answer
    x = 104,863.48

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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.