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Finding the Fourth Proportional to 130,003.80, 195,005.70 and 90,605.40

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Solution

The fourth proportional to 130,003.80, 195,005.70 and 90,605.40 is: 135,908.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,003.80 : 195,005.70 = 90,605.40 : x
  2. Step 2: Convert to fraction form
    130,003.80/195,005.70 = 90,605.40/x
  3. Step 3: Cross multiply
    130,003.80x = 195,005.70 × 90,605.40
  4. Step 4: Simplify right side
    130,003.80x = 17,668,569,450.78
  5. Step 5: Solve for x
    x = 17,668,569,450.78/130,003.80
  6. Step 6: Final answer
    x = 135,908.10

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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.