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Finding the Fourth Proportional to 212,407.65, 318,535.58 and 70,226.68

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Solution

The fourth proportional to 212,407.65, 318,535.58 and 70,226.68 is: 105,314.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,407.65 : 318,535.58 = 70,226.68 : x
  2. Step 2: Convert to fraction form
    212,407.65/318,535.58 = 70,226.68/x
  3. Step 3: Cross multiply
    212,407.65x = 318,535.58 × 70,226.68
  4. Step 4: Simplify right side
    212,407.65x = 22,369,695,500.47
  5. Step 5: Solve for x
    x = 22,369,695,500.47/212,407.65
  6. Step 6: Final answer
    x = 105,314.92

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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.