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Finding the Fourth Proportional to 153,659.97, 212,035.23 and 85,670.56

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Solution

The fourth proportional to 153,659.97, 212,035.23 and 85,670.56 is: 118,216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,659.97 : 212,035.23 = 85,670.56 : x
  2. Step 2: Convert to fraction form
    153,659.97/212,035.23 = 85,670.56/x
  3. Step 3: Cross multiply
    153,659.97x = 212,035.23 × 85,670.56
  4. Step 4: Simplify right side
    153,659.97x = 18,165,176,893.83
  5. Step 5: Solve for x
    x = 18,165,176,893.83/153,659.97
  6. Step 6: Final answer
    x = 118,216.72

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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.