Home / 85,357,631.34-128,036,779.17-20,661,332.60

Finding the Fourth Proportional to 85,357,631.34, 128,036,779.17 and 20,661,332.60

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Solution

The fourth proportional to 85,357,631.34, 128,036,779.17 and 20,661,332.60 is: 30,992,079.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,357,631.34 : 128,036,779.17 = 20,661,332.60 : x
  2. Step 2: Convert to fraction form
    85,357,631.34/128,036,779.17 = 20,661,332.60/x
  3. Step 3: Cross multiply
    85,357,631.34x = 128,036,779.17 × 20,661,332.60
  4. Step 4: Simplify right side
    85,357,631.34x = 2,645,410,479,784,214
  5. Step 5: Solve for x
    x = 2,645,410,479,784,214/85,357,631.34
  6. Step 6: Final answer
    x = 30,992,079.31

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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.