Home / 138,573.16-191,313.58-90,909.34

Finding the Fourth Proportional to 138,573.16, 191,313.58 and 90,909.34

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Solution

The fourth proportional to 138,573.16, 191,313.58 and 90,909.34 is: 125,509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,573.16 : 191,313.58 = 90,909.34 : x
  2. Step 2: Convert to fraction form
    138,573.16/191,313.58 = 90,909.34/x
  3. Step 3: Cross multiply
    138,573.16x = 191,313.58 × 90,909.34
  4. Step 4: Simplify right side
    138,573.16x = 17,392,190,334.27
  5. Step 5: Solve for x
    x = 17,392,190,334.27/138,573.16
  6. Step 6: Final answer
    x = 125,509.09

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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.