Home / 153,700.23-212,105.90-85,717.28

Finding the Fourth Proportional to 153,700.23, 212,105.90 and 85,717.28

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Solution

The fourth proportional to 153,700.23, 212,105.90 and 85,717.28 is: 118,289.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,700.23 : 212,105.90 = 85,717.28 : x
  2. Step 2: Convert to fraction form
    153,700.23/212,105.90 = 85,717.28/x
  3. Step 3: Cross multiply
    153,700.23x = 212,105.90 × 85,717.28
  4. Step 4: Simplify right side
    153,700.23x = 18,181,140,819.95
  5. Step 5: Solve for x
    x = 18,181,140,819.95/153,700.23
  6. Step 6: Final answer
    x = 118,289.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.