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Finding the Fourth Proportional to 90,678.84, 125,128.84 and 50,390.06

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Solution

The fourth proportional to 90,678.84, 125,128.84 and 50,390.06 is: 69,533.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,678.84 : 125,128.84 = 50,390.06 : x
  2. Step 2: Convert to fraction form
    90,678.84/125,128.84 = 50,390.06/x
  3. Step 3: Cross multiply
    90,678.84x = 125,128.84 × 50,390.06
  4. Step 4: Simplify right side
    90,678.84x = 6,305,249,755.33
  5. Step 5: Solve for x
    x = 6,305,249,755.33/90,678.84
  6. Step 6: Final answer
    x = 69,533.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.