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Finding the Fourth Proportional to 153,631.65, 212,027.40 and 85,659.69

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Solution

The fourth proportional to 153,631.65, 212,027.40 and 85,659.69 is: 118,219.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,631.65 : 212,027.40 = 85,659.69 : x
  2. Step 2: Convert to fraction form
    153,631.65/212,027.40 = 85,659.69/x
  3. Step 3: Cross multiply
    153,631.65x = 212,027.40 × 85,659.69
  4. Step 4: Simplify right side
    153,631.65x = 18,162,201,355.51
  5. Step 5: Solve for x
    x = 18,162,201,355.51/153,631.65
  6. Step 6: Final answer
    x = 118,219.14

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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.