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Finding the Fourth Proportional to 118,943.70, 178,415.55 and 90,950.10

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Solution

The fourth proportional to 118,943.70, 178,415.55 and 90,950.10 is: 136,425.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,943.70 : 178,415.55 = 90,950.10 : x
  2. Step 2: Convert to fraction form
    118,943.70/178,415.55 = 90,950.10/x
  3. Step 3: Cross multiply
    118,943.70x = 178,415.55 × 90,950.10
  4. Step 4: Simplify right side
    118,943.70x = 16,226,912,114.06
  5. Step 5: Solve for x
    x = 16,226,912,114.06/118,943.70
  6. Step 6: Final answer
    x = 136,425.15

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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.