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Finding the Fourth Proportional to 315,075.15, 472,642.16 and 125,489.79

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Solution

The fourth proportional to 315,075.15, 472,642.16 and 125,489.79 is: 188,246.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,075.15 : 472,642.16 = 125,489.79 : x
  2. Step 2: Convert to fraction form
    315,075.15/472,642.16 = 125,489.79/x
  3. Step 3: Cross multiply
    315,075.15x = 472,642.16 × 125,489.79
  4. Step 4: Simplify right side
    315,075.15x = 59,311,764,776.10
  5. Step 5: Solve for x
    x = 59,311,764,776.10/315,075.15
  6. Step 6: Final answer
    x = 188,246.41

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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.