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Finding the Fourth Proportional to 153,661.57, 212,042.14 and 85,675.64

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Solution

The fourth proportional to 153,661.57, 212,042.14 and 85,675.64 is: 118,226.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,661.57 : 212,042.14 = 85,675.64 : x
  2. Step 2: Convert to fraction form
    153,661.57/212,042.14 = 85,675.64/x
  3. Step 3: Cross multiply
    153,661.57x = 212,042.14 × 85,675.64
  4. Step 4: Simplify right side
    153,661.57x = 18,166,844,777.07
  5. Step 5: Solve for x
    x = 18,166,844,777.07/153,661.57
  6. Step 6: Final answer
    x = 118,226.34

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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.