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Finding the Fourth Proportional to 172,579.95, 238,159.85 and 97,128.45

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Solution

The fourth proportional to 172,579.95, 238,159.85 and 97,128.45 is: 134,036.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,579.95 : 238,159.85 = 97,128.45 : x
  2. Step 2: Convert to fraction form
    172,579.95/238,159.85 = 97,128.45/x
  3. Step 3: Cross multiply
    172,579.95x = 238,159.85 × 97,128.45
  4. Step 4: Simplify right side
    172,579.95x = 23,132,096,597.09
  5. Step 5: Solve for x
    x = 23,132,096,597.09/172,579.95
  6. Step 6: Final answer
    x = 134,036.99

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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.