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Finding the Fourth Proportional to 162,063.80, 243,314.40 and 128,821.40

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Solution

The fourth proportional to 162,063.80, 243,314.40 and 128,821.40 is: 193,405.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,063.80 : 243,314.40 = 128,821.40 : x
  2. Step 2: Convert to fraction form
    162,063.80/243,314.40 = 128,821.40/x
  3. Step 3: Cross multiply
    162,063.80x = 243,314.40 × 128,821.40
  4. Step 4: Simplify right side
    162,063.80x = 31,344,101,648.16
  5. Step 5: Solve for x
    x = 31,344,101,648.16/162,063.80
  6. Step 6: Final answer
    x = 193,405.94

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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.