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Finding the Fourth Proportional to 121,864.40, 182,537.40 and 101,128.40

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Solution

The fourth proportional to 121,864.40, 182,537.40 and 101,128.40 is: 151,477.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,864.40 : 182,537.40 = 101,128.40 : x
  2. Step 2: Convert to fraction form
    121,864.40/182,537.40 = 101,128.40/x
  3. Step 3: Cross multiply
    121,864.40x = 182,537.40 × 101,128.40
  4. Step 4: Simplify right side
    121,864.40x = 18,459,715,202.16
  5. Step 5: Solve for x
    x = 18,459,715,202.16/121,864.40
  6. Step 6: Final answer
    x = 151,477.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.