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Finding the Fourth Proportional to 124,690.50, 172,072.89 and 68,102.01

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Solution

The fourth proportional to 124,690.50, 172,072.89 and 68,102.01 is: 93,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,690.50 : 172,072.89 = 68,102.01 : x
  2. Step 2: Convert to fraction form
    124,690.50/172,072.89 = 68,102.01/x
  3. Step 3: Cross multiply
    124,690.50x = 172,072.89 × 68,102.01
  4. Step 4: Simplify right side
    124,690.50x = 11,718,509,675.51
  5. Step 5: Solve for x
    x = 11,718,509,675.51/124,690.50
  6. Step 6: Final answer
    x = 93,980.77

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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.