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Finding the Fourth Proportional to 315,879.95, 435,907.85 and 172,641.02

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Solution

The fourth proportional to 315,879.95, 435,907.85 and 172,641.02 is: 238,241.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,879.95 : 435,907.85 = 172,641.02 : x
  2. Step 2: Convert to fraction form
    315,879.95/435,907.85 = 172,641.02/x
  3. Step 3: Cross multiply
    315,879.95x = 435,907.85 × 172,641.02
  4. Step 4: Simplify right side
    315,879.95x = 75,255,574,102.07
  5. Step 5: Solve for x
    x = 75,255,574,102.07/315,879.95
  6. Step 6: Final answer
    x = 238,241.06

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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.