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Finding the Fourth Proportional to 153,999.54, 212,522.85 and 90,383.22

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Solution

The fourth proportional to 153,999.54, 212,522.85 and 90,383.22 is: 124,730.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,999.54 : 212,522.85 = 90,383.22 : x
  2. Step 2: Convert to fraction form
    153,999.54/212,522.85 = 90,383.22/x
  3. Step 3: Cross multiply
    153,999.54x = 212,522.85 × 90,383.22
  4. Step 4: Simplify right side
    153,999.54x = 19,208,499,506.58
  5. Step 5: Solve for x
    x = 19,208,499,506.58/153,999.54
  6. Step 6: Final answer
    x = 124,730.89

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1.5x scale

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.