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Finding the Fourth Proportional to 153,773.53, 212,202.66 and 90,153.70

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Solution

The fourth proportional to 153,773.53, 212,202.66 and 90,153.70 is: 124,409.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,773.53 : 212,202.66 = 90,153.70 : x
  2. Step 2: Convert to fraction form
    153,773.53/212,202.66 = 90,153.70/x
  3. Step 3: Cross multiply
    153,773.53x = 212,202.66 × 90,153.70
  4. Step 4: Simplify right side
    153,773.53x = 19,130,854,948.84
  5. Step 5: Solve for x
    x = 19,130,854,948.84/153,773.53
  6. Step 6: Final answer
    x = 124,409.29

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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.