Home / 85,517,813.70-128,276,720.55-74,756,133.45

Finding the Fourth Proportional to 85,517,813.70, 128,276,720.55 and 74,756,133.45

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Solution

The fourth proportional to 85,517,813.70, 128,276,720.55 and 74,756,133.45 is: 112,134,200.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,517,813.70 : 128,276,720.55 = 74,756,133.45 : x
  2. Step 2: Convert to fraction form
    85,517,813.70/128,276,720.55 = 74,756,133.45/x
  3. Step 3: Cross multiply
    85,517,813.70x = 128,276,720.55 × 74,756,133.45
  4. Step 4: Simplify right side
    85,517,813.70x = 9,589,471,639,964,158
  5. Step 5: Solve for x
    x = 9,589,471,639,964,158/85,517,813.70
  6. Step 6: Final answer
    x = 112,134,200.18

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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.