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Finding the Fourth Proportional to 178,428, 246,230.64 and 98,940

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Solution

The fourth proportional to 178,428, 246,230.64 and 98,940 is: 136,537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,428 : 246,230.64 = 98,940 : x
  2. Step 2: Convert to fraction form
    178,428/246,230.64 = 98,940/x
  3. Step 3: Cross multiply
    178,428x = 246,230.64 × 98,940
  4. Step 4: Simplify right side
    178,428x = 24,362,059,521.60
  5. Step 5: Solve for x
    x = 24,362,059,521.60/178,428
  6. Step 6: Final answer
    x = 136,537.20

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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.