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Finding the Fourth Proportional to 153,878.73, 212,388.06 and 90,237.03

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Solution

The fourth proportional to 153,878.73, 212,388.06 and 90,237.03 is: 124,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,878.73 : 212,388.06 = 90,237.03 : x
  2. Step 2: Convert to fraction form
    153,878.73/212,388.06 = 90,237.03/x
  3. Step 3: Cross multiply
    153,878.73x = 212,388.06 × 90,237.03
  4. Step 4: Simplify right side
    153,878.73x = 19,165,267,741.86
  5. Step 5: Solve for x
    x = 19,165,267,741.86/153,878.73
  6. Step 6: Final answer
    x = 124,547.87

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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.