Home / 90,639,125.70-135,958,688.55-76,290,218.70

Finding the Fourth Proportional to 90,639,125.70, 135,958,688.55 and 76,290,218.70

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Solution

The fourth proportional to 90,639,125.70, 135,958,688.55 and 76,290,218.70 is: 114,435,328.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,639,125.70 : 135,958,688.55 = 76,290,218.70 : x
  2. Step 2: Convert to fraction form
    90,639,125.70/135,958,688.55 = 76,290,218.70/x
  3. Step 3: Cross multiply
    90,639,125.70x = 135,958,688.55 × 76,290,218.70
  4. Step 4: Simplify right side
    90,639,125.70x = 10,372,318,083,644,688
  5. Step 5: Solve for x
    x = 10,372,318,083,644,688/90,639,125.70
  6. Step 6: Final answer
    x = 114,435,328.05

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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.