Home / 138,389.56-191,008.68-90,615.16

Finding the Fourth Proportional to 138,389.56, 191,008.68 and 90,615.16

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Solution

The fourth proportional to 138,389.56, 191,008.68 and 90,615.16 is: 125,069.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,389.56 : 191,008.68 = 90,615.16 : x
  2. Step 2: Convert to fraction form
    138,389.56/191,008.68 = 90,615.16/x
  3. Step 3: Cross multiply
    138,389.56x = 191,008.68 × 90,615.16
  4. Step 4: Simplify right side
    138,389.56x = 17,308,282,099.59
  5. Step 5: Solve for x
    x = 17,308,282,099.59/138,389.56
  6. Step 6: Final answer
    x = 125,069.28

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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.