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Finding the Fourth Proportional to 153,651.06, 212,018.31 and 85,651.56

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Solution

The fourth proportional to 153,651.06, 212,018.31 and 85,651.56 is: 118,187.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,651.06 : 212,018.31 = 85,651.56 : x
  2. Step 2: Convert to fraction form
    153,651.06/212,018.31 = 85,651.56/x
  3. Step 3: Cross multiply
    153,651.06x = 212,018.31 × 85,651.56
  4. Step 4: Simplify right side
    153,651.06x = 18,159,699,000.06
  5. Step 5: Solve for x
    x = 18,159,699,000.06/153,651.06
  6. Step 6: Final answer
    x = 118,187.92

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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.