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Finding the Fourth Proportional to 154,295.98, 212,918.40 and 86,301.16

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Solution

The fourth proportional to 154,295.98, 212,918.40 and 86,301.16 is: 119,089.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,295.98 : 212,918.40 = 86,301.16 : x
  2. Step 2: Convert to fraction form
    154,295.98/212,918.40 = 86,301.16/x
  3. Step 3: Cross multiply
    154,295.98x = 212,918.40 × 86,301.16
  4. Step 4: Simplify right side
    154,295.98x = 18,375,104,905.34
  5. Step 5: Solve for x
    x = 18,375,104,905.34/154,295.98
  6. Step 6: Final answer
    x = 119,089.98

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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.