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Finding the Fourth Proportional to 212,653.46, 318,969.59 and 79,523.93

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Solution

The fourth proportional to 212,653.46, 318,969.59 and 79,523.93 is: 119,281.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,653.46 : 318,969.59 = 79,523.93 : x
  2. Step 2: Convert to fraction form
    212,653.46/318,969.59 = 79,523.93/x
  3. Step 3: Cross multiply
    212,653.46x = 318,969.59 × 79,523.93
  4. Step 4: Simplify right side
    212,653.46x = 25,365,716,343.52
  5. Step 5: Solve for x
    x = 25,365,716,343.52/212,653.46
  6. Step 6: Final answer
    x = 119,281.93

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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.