Home / 210,104.40-315,143.28-85,442.16

Finding the Fourth Proportional to 210,104.40, 315,143.28 and 85,442.16

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Solution

The fourth proportional to 210,104.40, 315,143.28 and 85,442.16 is: 128,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,104.40 : 315,143.28 = 85,442.16 : x
  2. Step 2: Convert to fraction form
    210,104.40/315,143.28 = 85,442.16/x
  3. Step 3: Cross multiply
    210,104.40x = 315,143.28 × 85,442.16
  4. Step 4: Simplify right side
    210,104.40x = 26,926,522,552.68
  5. Step 5: Solve for x
    x = 26,926,522,552.68/210,104.40
  6. Step 6: Final answer
    x = 128,157.82

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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.