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Finding the Fourth Proportional to 153,973.71, 212,481.72 and 85,991.94

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Solution

The fourth proportional to 153,973.71, 212,481.72 and 85,991.94 is: 118,667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,973.71 : 212,481.72 = 85,991.94 : x
  2. Step 2: Convert to fraction form
    153,973.71/212,481.72 = 85,991.94/x
  3. Step 3: Cross multiply
    153,973.71x = 212,481.72 × 85,991.94
  4. Step 4: Simplify right side
    153,973.71x = 18,271,715,317.34
  5. Step 5: Solve for x
    x = 18,271,715,317.34/153,973.71
  6. Step 6: Final answer
    x = 118,667.76

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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.