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Finding the Fourth Proportional to 312,776.19, 469,164.33 and 76,118.87

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Solution

The fourth proportional to 312,776.19, 469,164.33 and 76,118.87 is: 114,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,776.19 : 469,164.33 = 76,118.87 : x
  2. Step 2: Convert to fraction form
    312,776.19/469,164.33 = 76,118.87/x
  3. Step 3: Cross multiply
    312,776.19x = 469,164.33 × 76,118.87
  4. Step 4: Simplify right side
    312,776.19x = 35,712,258,342.90
  5. Step 5: Solve for x
    x = 35,712,258,342.90/312,776.19
  6. Step 6: Final answer
    x = 114,178.31

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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.