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Finding the Fourth Proportional to 312,281.80, 468,374.10 and 87,620.20

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Solution

The fourth proportional to 312,281.80, 468,374.10 and 87,620.20 is: 131,416.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,281.80 : 468,374.10 = 87,620.20 : x
  2. Step 2: Convert to fraction form
    312,281.80/468,374.10 = 87,620.20/x
  3. Step 3: Cross multiply
    312,281.80x = 468,374.10 × 87,620.20
  4. Step 4: Simplify right side
    312,281.80x = 41,039,032,316.82
  5. Step 5: Solve for x
    x = 41,039,032,316.82/312,281.80
  6. Step 6: Final answer
    x = 131,416.66

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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.