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Finding the Fourth Proportional to 155,407.55, 214,462.11 and 87,424.58

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Solution

The fourth proportional to 155,407.55, 214,462.11 and 87,424.58 is: 120,645.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,407.55 : 214,462.11 = 87,424.58 : x
  2. Step 2: Convert to fraction form
    155,407.55/214,462.11 = 87,424.58/x
  3. Step 3: Cross multiply
    155,407.55x = 214,462.11 × 87,424.58
  4. Step 4: Simplify right side
    155,407.55x = 18,749,259,892.66
  5. Step 5: Solve for x
    x = 18,749,259,892.66/155,407.55
  6. Step 6: Final answer
    x = 120,645.75

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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.