Home / 128,711,658.42-177,679,342.53-76,517,591.22

Finding the Fourth Proportional to 128,711,658.42, 177,679,342.53 and 76,517,591.22

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Solution

The fourth proportional to 128,711,658.42, 177,679,342.53 and 76,517,591.22 is: 105,628,312.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,711,658.42 : 177,679,342.53 = 76,517,591.22 : x
  2. Step 2: Convert to fraction form
    128,711,658.42/177,679,342.53 = 76,517,591.22/x
  3. Step 3: Cross multiply
    128,711,658.42x = 177,679,342.53 × 76,517,591.22
  4. Step 4: Simplify right side
    128,711,658.42x = 13,595,595,299,948,900
  5. Step 5: Solve for x
    x = 13,595,595,299,948,900/128,711,658.42
  6. Step 6: Final answer
    x = 105,628,312.67

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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.