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Finding the Fourth Proportional to 78,190.88, 107,900.79 and 46,340.87

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Solution

The fourth proportional to 78,190.88, 107,900.79 and 46,340.87 is: 63,948.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.88 : 107,900.79 = 46,340.87 : x
  2. Step 2: Convert to fraction form
    78,190.88/107,900.79 = 46,340.87/x
  3. Step 3: Cross multiply
    78,190.88x = 107,900.79 × 46,340.87
  4. Step 4: Simplify right side
    78,190.88x = 5,000,216,482.29
  5. Step 5: Solve for x
    x = 5,000,216,482.29/78,190.88
  6. Step 6: Final answer
    x = 63,948.85

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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.