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Finding the Fourth Proportional to 158,312.53, 218,451.29 and 126,128.78

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Solution

The fourth proportional to 158,312.53, 218,451.29 and 126,128.78 is: 174,041.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,312.53 : 218,451.29 = 126,128.78 : x
  2. Step 2: Convert to fraction form
    158,312.53/218,451.29 = 126,128.78/x
  3. Step 3: Cross multiply
    158,312.53x = 218,451.29 × 126,128.78
  4. Step 4: Simplify right side
    158,312.53x = 27,552,994,697.13
  5. Step 5: Solve for x
    x = 27,552,994,697.13/158,312.53
  6. Step 6: Final answer
    x = 174,041.78

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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.