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Finding the Fourth Proportional to 90,044.70, 134,888.85 and 78,963.90

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Solution

The fourth proportional to 90,044.70, 134,888.85 and 78,963.90 is: 118,289.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,044.70 : 134,888.85 = 78,963.90 : x
  2. Step 2: Convert to fraction form
    90,044.70/134,888.85 = 78,963.90/x
  3. Step 3: Cross multiply
    90,044.70x = 134,888.85 × 78,963.90
  4. Step 4: Simplify right side
    90,044.70x = 10,651,349,662.52
  5. Step 5: Solve for x
    x = 10,651,349,662.52/90,044.70
  6. Step 6: Final answer
    x = 118,289.58

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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.