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Finding the Fourth Proportional to 158,602.50, 218,851.29 and 86,963.67

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Solution

The fourth proportional to 158,602.50, 218,851.29 and 86,963.67 is: 119,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,602.50 : 218,851.29 = 86,963.67 : x
  2. Step 2: Convert to fraction form
    158,602.50/218,851.29 = 86,963.67/x
  3. Step 3: Cross multiply
    158,602.50x = 218,851.29 × 86,963.67
  4. Step 4: Simplify right side
    158,602.50x = 19,032,111,362.63
  5. Step 5: Solve for x
    x = 19,032,111,362.63/158,602.50
  6. Step 6: Final answer
    x = 119,998.81

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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.