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Finding the Fourth Proportional to 212,859.93, 319,314.60 and 70,717.89

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Solution

The fourth proportional to 212,859.93, 319,314.60 and 70,717.89 is: 106,085.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,859.93 : 319,314.60 = 70,717.89 : x
  2. Step 2: Convert to fraction form
    212,859.93/319,314.60 = 70,717.89/x
  3. Step 3: Cross multiply
    212,859.93x = 319,314.60 × 70,717.89
  4. Step 4: Simplify right side
    212,859.93x = 22,581,254,758.19
  5. Step 5: Solve for x
    x = 22,581,254,758.19/212,859.93
  6. Step 6: Final answer
    x = 106,085.04

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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.