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Finding the Fourth Proportional to 316,168.93, 436,323.56 and 172,928.98

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Solution

The fourth proportional to 316,168.93, 436,323.56 and 172,928.98 is: 238,647.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,168.93 : 436,323.56 = 172,928.98 : x
  2. Step 2: Convert to fraction form
    316,168.93/436,323.56 = 172,928.98/x
  3. Step 3: Cross multiply
    316,168.93x = 436,323.56 × 172,928.98
  4. Step 4: Simplify right side
    316,168.93x = 75,452,985,134.51
  5. Step 5: Solve for x
    x = 75,452,985,134.51/316,168.93
  6. Step 6: Final answer
    x = 238,647.69

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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.