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Finding the Fourth Proportional to 153,886.46, 212,369.73 and 85,907.21

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Solution

The fourth proportional to 153,886.46, 212,369.73 and 85,907.21 is: 118,555.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,886.46 : 212,369.73 = 85,907.21 : x
  2. Step 2: Convert to fraction form
    153,886.46/212,369.73 = 85,907.21/x
  3. Step 3: Cross multiply
    153,886.46x = 212,369.73 × 85,907.21
  4. Step 4: Simplify right side
    153,886.46x = 18,244,090,992.75
  5. Step 5: Solve for x
    x = 18,244,090,992.75/153,886.46
  6. Step 6: Final answer
    x = 118,555.53

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1.5x scale

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.