Home / 85,481,411.14-128,220,318.51-20,785,547.98

Finding the Fourth Proportional to 85,481,411.14, 128,220,318.51 and 20,785,547.98

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Solution

The fourth proportional to 85,481,411.14, 128,220,318.51 and 20,785,547.98 is: 31,177,884.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481,411.14 : 128,220,318.51 = 20,785,547.98 : x
  2. Step 2: Convert to fraction form
    85,481,411.14/128,220,318.51 = 20,785,547.98/x
  3. Step 3: Cross multiply
    85,481,411.14x = 128,220,318.51 × 20,785,547.98
  4. Step 4: Simplify right side
    85,481,411.14x = 2,665,129,582,400,487.50
  5. Step 5: Solve for x
    x = 2,665,129,582,400,487.50/85,481,411.14
  6. Step 6: Final answer
    x = 31,177,884.72

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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.