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Finding the Fourth Proportional to 185,313.36, 255,731.40 and 100,430.40

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Solution

The fourth proportional to 185,313.36, 255,731.40 and 100,430.40 is: 138,593.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,313.36 : 255,731.40 = 100,430.40 : x
  2. Step 2: Convert to fraction form
    185,313.36/255,731.40 = 100,430.40/x
  3. Step 3: Cross multiply
    185,313.36x = 255,731.40 × 100,430.40
  4. Step 4: Simplify right side
    185,313.36x = 25,683,206,794.56
  5. Step 5: Solve for x
    x = 25,683,206,794.56/185,313.36
  6. Step 6: Final answer
    x = 138,593.39

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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.