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Finding the Fourth Proportional to 221,381.60, 305,510.01 and 120,779.60

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Solution

The fourth proportional to 221,381.60, 305,510.01 and 120,779.60 is: 166,677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,381.60 : 305,510.01 = 120,779.60 : x
  2. Step 2: Convert to fraction form
    221,381.60/305,510.01 = 120,779.60/x
  3. Step 3: Cross multiply
    221,381.60x = 305,510.01 × 120,779.60
  4. Step 4: Simplify right side
    221,381.60x = 36,899,376,803.80
  5. Step 5: Solve for x
    x = 36,899,376,803.80/221,381.60
  6. Step 6: Final answer
    x = 166,677.70

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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.