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Finding the Fourth Proportional to 153,635.65, 212,018.04 and 85,656.87

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Solution

The fourth proportional to 153,635.65, 212,018.04 and 85,656.87 is: 118,206.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,635.65 : 212,018.04 = 85,656.87 : x
  2. Step 2: Convert to fraction form
    153,635.65/212,018.04 = 85,656.87/x
  3. Step 3: Cross multiply
    153,635.65x = 212,018.04 × 85,656.87
  4. Step 4: Simplify right side
    153,635.65x = 18,160,801,689.93
  5. Step 5: Solve for x
    x = 18,160,801,689.93/153,635.65
  6. Step 6: Final answer
    x = 118,206.95

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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.