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Finding the Fourth Proportional to 154,354.35, 212,941.42 and 90,663.44

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Solution

The fourth proportional to 154,354.35, 212,941.42 and 90,663.44 is: 125,075.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,354.35 : 212,941.42 = 90,663.44 : x
  2. Step 2: Convert to fraction form
    154,354.35/212,941.42 = 90,663.44/x
  3. Step 3: Cross multiply
    154,354.35x = 212,941.42 × 90,663.44
  4. Step 4: Simplify right side
    154,354.35x = 19,306,001,655.68
  5. Step 5: Solve for x
    x = 19,306,001,655.68/154,354.35
  6. Step 6: Final answer
    x = 125,075.85

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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.