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Finding the Fourth Proportional to 153,363.53, 211,637.55 and 85,380.51

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Solution

The fourth proportional to 153,363.53, 211,637.55 and 85,380.51 is: 117,822.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,363.53 : 211,637.55 = 85,380.51 : x
  2. Step 2: Convert to fraction form
    153,363.53/211,637.55 = 85,380.51/x
  3. Step 3: Cross multiply
    153,363.53x = 211,637.55 × 85,380.51
  4. Step 4: Simplify right side
    153,363.53x = 18,069,721,954.15
  5. Step 5: Solve for x
    x = 18,069,721,954.15/153,363.53
  6. Step 6: Final answer
    x = 117,822.81

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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.