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Finding the Fourth Proportional to 239,368.78, 357,588.46 and 172,235.98

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Solution

The fourth proportional to 239,368.78, 357,588.46 and 172,235.98 is: 257,300.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,368.78 : 357,588.46 = 172,235.98 : x
  2. Step 2: Convert to fraction form
    239,368.78/357,588.46 = 172,235.98/x
  3. Step 3: Cross multiply
    239,368.78x = 357,588.46 × 172,235.98
  4. Step 4: Simplify right side
    239,368.78x = 61,589,598,844.79
  5. Step 5: Solve for x
    x = 61,589,598,844.79/239,368.78
  6. Step 6: Final answer
    x = 257,300.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.