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Finding the Fourth Proportional to 259,937.78, 389,943.90 and 80,038.46

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Solution

The fourth proportional to 259,937.78, 389,943.90 and 80,038.46 is: 120,069.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,937.78 : 389,943.90 = 80,038.46 : x
  2. Step 2: Convert to fraction form
    259,937.78/389,943.90 = 80,038.46/x
  3. Step 3: Cross multiply
    259,937.78x = 389,943.90 × 80,038.46
  4. Step 4: Simplify right side
    259,937.78x = 31,210,509,242.39
  5. Step 5: Solve for x
    x = 31,210,509,242.39/259,937.78
  6. Step 6: Final answer
    x = 120,069.15

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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.