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Finding the Fourth Proportional to 84,985.70, 127,219.35 and 49,820.90

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Solution

The fourth proportional to 84,985.70, 127,219.35 and 49,820.90 is: 74,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,985.70 : 127,219.35 = 49,820.90 : x
  2. Step 2: Convert to fraction form
    84,985.70/127,219.35 = 49,820.90/x
  3. Step 3: Cross multiply
    84,985.70x = 127,219.35 × 49,820.90
  4. Step 4: Simplify right side
    84,985.70x = 6,338,182,514.42
  5. Step 5: Solve for x
    x = 6,338,182,514.42/84,985.70
  6. Step 6: Final answer
    x = 74,579.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.