Home / 85,966,428.60-128,949,642.90-80,923,433.40

Finding the Fourth Proportional to 85,966,428.60, 128,949,642.90 and 80,923,433.40

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Solution

The fourth proportional to 85,966,428.60, 128,949,642.90 and 80,923,433.40 is: 121,385,150.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,966,428.60 : 128,949,642.90 = 80,923,433.40 : x
  2. Step 2: Convert to fraction form
    85,966,428.60/128,949,642.90 = 80,923,433.40/x
  3. Step 3: Cross multiply
    85,966,428.60x = 128,949,642.90 × 80,923,433.40
  4. Step 4: Simplify right side
    85,966,428.60x = 10,435,047,839,171,934
  5. Step 5: Solve for x
    x = 10,435,047,839,171,934/85,966,428.60
  6. Step 6: Final answer
    x = 121,385,150.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.