Home / 128,745,728.49-177,672,472.58-70,011,828.71

Finding the Fourth Proportional to 128,745,728.49, 177,672,472.58 and 70,011,828.71

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Solution

The fourth proportional to 128,745,728.49, 177,672,472.58 and 70,011,828.71 is: 96,618,154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,745,728.49 : 177,672,472.58 = 70,011,828.71 : x
  2. Step 2: Convert to fraction form
    128,745,728.49/177,672,472.58 = 70,011,828.71/x
  3. Step 3: Cross multiply
    128,745,728.49x = 177,672,472.58 × 70,011,828.71
  4. Step 4: Simplify right side
    128,745,728.49x = 12,439,174,716,753,132
  5. Step 5: Solve for x
    x = 12,439,174,716,753,132/128,745,728.49
  6. Step 6: Final answer
    x = 96,618,154.74

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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.