Home / 100,045.10-150,184.90-78,999.28

Finding the Fourth Proportional to 100,045.10, 150,184.90 and 78,999.28

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Solution

The fourth proportional to 100,045.10, 150,184.90 and 78,999.28 is: 118,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,045.10 : 150,184.90 = 78,999.28 : x
  2. Step 2: Convert to fraction form
    100,045.10/150,184.90 = 78,999.28/x
  3. Step 3: Cross multiply
    100,045.10x = 150,184.90 × 78,999.28
  4. Step 4: Simplify right side
    100,045.10x = 11,864,498,966.87
  5. Step 5: Solve for x
    x = 11,864,498,966.87/100,045.10
  6. Step 6: Final answer
    x = 118,591.50

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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.