Home / 212,079.49-318,035.53-85,695.91

Finding the Fourth Proportional to 212,079.49, 318,035.53 and 85,695.91

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Solution

The fourth proportional to 212,079.49, 318,035.53 and 85,695.91 is: 128,510.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,079.49 : 318,035.53 = 85,695.91 : x
  2. Step 2: Convert to fraction form
    212,079.49/318,035.53 = 85,695.91/x
  3. Step 3: Cross multiply
    212,079.49x = 318,035.53 × 85,695.91
  4. Step 4: Simplify right side
    212,079.49x = 27,254,342,137.03
  5. Step 5: Solve for x
    x = 27,254,342,137.03/212,079.49
  6. Step 6: Final answer
    x = 128,510.04

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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.