Home / 129,416,780.91-178,599,564.45-76,538,816.67

Finding the Fourth Proportional to 129,416,780.91, 178,599,564.45 and 76,538,816.67

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Solution

The fourth proportional to 129,416,780.91, 178,599,564.45 and 76,538,816.67 is: 105,626,173.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,416,780.91 : 178,599,564.45 = 76,538,816.67 : x
  2. Step 2: Convert to fraction form
    129,416,780.91/178,599,564.45 = 76,538,816.67/x
  3. Step 3: Cross multiply
    129,416,780.91x = 178,599,564.45 × 76,538,816.67
  4. Step 4: Simplify right side
    129,416,780.91x = 13,669,799,320,780,398
  5. Step 5: Solve for x
    x = 13,669,799,320,780,398/129,416,780.91
  6. Step 6: Final answer
    x = 105,626,173.24

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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.