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Finding the Fourth Proportional to 158,907.70, 219,312.15 and 91,839.70

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Solution

The fourth proportional to 158,907.70, 219,312.15 and 91,839.70 is: 126,750.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,907.70 : 219,312.15 = 91,839.70 : x
  2. Step 2: Convert to fraction form
    158,907.70/219,312.15 = 91,839.70/x
  3. Step 3: Cross multiply
    158,907.70x = 219,312.15 × 91,839.70
  4. Step 4: Simplify right side
    158,907.70x = 20,141,562,062.36
  5. Step 5: Solve for x
    x = 20,141,562,062.36/158,907.70
  6. Step 6: Final answer
    x = 126,750.07

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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.