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Finding the Fourth Proportional to 177,638.40, 266,230.80 and 72,338.40

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Solution

The fourth proportional to 177,638.40, 266,230.80 and 72,338.40 is: 108,415.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,638.40 : 266,230.80 = 72,338.40 : x
  2. Step 2: Convert to fraction form
    177,638.40/266,230.80 = 72,338.40/x
  3. Step 3: Cross multiply
    177,638.40x = 266,230.80 × 72,338.40
  4. Step 4: Simplify right side
    177,638.40x = 19,258,710,102.72
  5. Step 5: Solve for x
    x = 19,258,710,102.72/177,638.40
  6. Step 6: Final answer
    x = 108,415.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.