Home / 290,426.18-435,623.60-90,723.64

Finding the Fourth Proportional to 290,426.18, 435,623.60 and 90,723.64

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Solution

The fourth proportional to 290,426.18, 435,623.60 and 90,723.64 is: 136,080.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,426.18 : 435,623.60 = 90,723.64 : x
  2. Step 2: Convert to fraction form
    290,426.18/435,623.60 = 90,723.64/x
  3. Step 3: Cross multiply
    290,426.18x = 435,623.60 × 90,723.64
  4. Step 4: Simplify right side
    290,426.18x = 39,521,358,661.90
  5. Step 5: Solve for x
    x = 39,521,358,661.90/290,426.18
  6. Step 6: Final answer
    x = 136,080.56

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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.