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Finding the Fourth Proportional to 221,955.72, 306,300.18 and 121,353.72

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Solution

The fourth proportional to 221,955.72, 306,300.18 and 121,353.72 is: 167,468.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,955.72 : 306,300.18 = 121,353.72 : x
  2. Step 2: Convert to fraction form
    221,955.72/306,300.18 = 121,353.72/x
  3. Step 3: Cross multiply
    221,955.72x = 306,300.18 × 121,353.72
  4. Step 4: Simplify right side
    221,955.72x = 37,170,666,279.67
  5. Step 5: Solve for x
    x = 37,170,666,279.67/221,955.72
  6. Step 6: Final answer
    x = 167,468.84

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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.