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Finding the Fourth Proportional to 387,778.53, 581,675.09 and 121,533.15

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Solution

The fourth proportional to 387,778.53, 581,675.09 and 121,533.15 is: 182,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,778.53 : 581,675.09 = 121,533.15 : x
  2. Step 2: Convert to fraction form
    387,778.53/581,675.09 = 121,533.15/x
  3. Step 3: Cross multiply
    387,778.53x = 581,675.09 × 121,533.15
  4. Step 4: Simplify right side
    387,778.53x = 70,692,805,356.57
  5. Step 5: Solve for x
    x = 70,692,805,356.57/387,778.53
  6. Step 6: Final answer
    x = 182,302.01

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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.