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Finding the Fourth Proportional to 133,048.51, 183,603.40 and 72,619.90

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Solution

The fourth proportional to 133,048.51, 183,603.40 and 72,619.90 is: 100,213.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,048.51 : 183,603.40 = 72,619.90 : x
  2. Step 2: Convert to fraction form
    133,048.51/183,603.40 = 72,619.90/x
  3. Step 3: Cross multiply
    133,048.51x = 183,603.40 × 72,619.90
  4. Step 4: Simplify right side
    133,048.51x = 13,333,260,547.66
  5. Step 5: Solve for x
    x = 13,333,260,547.66/133,048.51
  6. Step 6: Final answer
    x = 100,213.53

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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.