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Finding the Fourth Proportional to 212,856.60, 319,139.10 and 100,590.60

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Solution

The fourth proportional to 212,856.60, 319,139.10 and 100,590.60 is: 150,817.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,856.60 : 319,139.10 = 100,590.60 : x
  2. Step 2: Convert to fraction form
    212,856.60/319,139.10 = 100,590.60/x
  3. Step 3: Cross multiply
    212,856.60x = 319,139.10 × 100,590.60
  4. Step 4: Simplify right side
    212,856.60x = 32,102,393,552.46
  5. Step 5: Solve for x
    x = 32,102,393,552.46/212,856.60
  6. Step 6: Final answer
    x = 150,817.00

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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.