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Finding the Fourth Proportional to 221,152.95, 305,189.47 and 125,659.64

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Solution

The fourth proportional to 221,152.95, 305,189.47 and 125,659.64 is: 173,409.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,152.95 : 305,189.47 = 125,659.64 : x
  2. Step 2: Convert to fraction form
    221,152.95/305,189.47 = 125,659.64/x
  3. Step 3: Cross multiply
    221,152.95x = 305,189.47 × 125,659.64
  4. Step 4: Simplify right side
    221,152.95x = 38,349,998,303.69
  5. Step 5: Solve for x
    x = 38,349,998,303.69/221,152.95
  6. Step 6: Final answer
    x = 173,409.39

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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.