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Finding the Fourth Proportional to 90,996.70, 136,430.40 and 34,789.48

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Solution

The fourth proportional to 90,996.70, 136,430.40 and 34,789.48 is: 52,159.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,996.70 : 136,430.40 = 34,789.48 : x
  2. Step 2: Convert to fraction form
    90,996.70/136,430.40 = 34,789.48/x
  3. Step 3: Cross multiply
    90,996.70x = 136,430.40 × 34,789.48
  4. Step 4: Simplify right side
    90,996.70x = 4,746,342,672.19
  5. Step 5: Solve for x
    x = 4,746,342,672.19/90,996.70
  6. Step 6: Final answer
    x = 52,159.50

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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.