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Finding the Fourth Proportional to 101,807.90, 153,039.90 and 72,429.20

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Solution

The fourth proportional to 101,807.90, 153,039.90 and 72,429.20 is: 108,877.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,807.90 : 153,039.90 = 72,429.20 : x
  2. Step 2: Convert to fraction form
    101,807.90/153,039.90 = 72,429.20/x
  3. Step 3: Cross multiply
    101,807.90x = 153,039.90 × 72,429.20
  4. Step 4: Simplify right side
    101,807.90x = 11,084,557,525.08
  5. Step 5: Solve for x
    x = 11,084,557,525.08/101,807.90
  6. Step 6: Final answer
    x = 108,877.18

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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.