Home / 128,746,836.66-177,665,228.35-72,996,008.56

Finding the Fourth Proportional to 128,746,836.66, 177,665,228.35 and 72,996,008.56

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Solution

The fourth proportional to 128,746,836.66, 177,665,228.35 and 72,996,008.56 is: 100,731,426.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,746,836.66 : 177,665,228.35 = 72,996,008.56 : x
  2. Step 2: Convert to fraction form
    128,746,836.66/177,665,228.35 = 72,996,008.56/x
  3. Step 3: Cross multiply
    128,746,836.66x = 177,665,228.35 × 72,996,008.56
  4. Step 4: Simplify right side
    128,746,836.66x = 12,968,852,529,450,954
  5. Step 5: Solve for x
    x = 12,968,852,529,450,954/128,746,836.66
  6. Step 6: Final answer
    x = 100,731,426.62

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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.