Home / 113,225.40-155,981.07-79,170.21

Finding the Fourth Proportional to 113,225.40, 155,981.07 and 79,170.21

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Solution

The fourth proportional to 113,225.40, 155,981.07 and 79,170.21 is: 109,066.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,225.40 : 155,981.07 = 79,170.21 : x
  2. Step 2: Convert to fraction form
    113,225.40/155,981.07 = 79,170.21/x
  3. Step 3: Cross multiply
    113,225.40x = 155,981.07 × 79,170.21
  4. Step 4: Simplify right side
    113,225.40x = 12,349,054,067.92
  5. Step 5: Solve for x
    x = 12,349,054,067.92/113,225.40
  6. Step 6: Final answer
    x = 109,066.11

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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.