Home / 131,008.51-180,928.99-90,278.54

Finding the Fourth Proportional to 131,008.51, 180,928.99 and 90,278.54

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Solution

The fourth proportional to 131,008.51, 180,928.99 and 90,278.54 is: 124,678.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,008.51 : 180,928.99 = 90,278.54 : x
  2. Step 2: Convert to fraction form
    131,008.51/180,928.99 = 90,278.54/x
  3. Step 3: Cross multiply
    131,008.51x = 180,928.99 × 90,278.54
  4. Step 4: Simplify right side
    131,008.51x = 16,334,005,838.07
  5. Step 5: Solve for x
    x = 16,334,005,838.07/131,008.51
  6. Step 6: Final answer
    x = 124,678.96

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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.