Home / 191,978,318.92-287,829,927.02-81,321,445.48

Finding the Fourth Proportional to 191,978,318.92, 287,829,927.02 and 81,321,445.48

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Solution

The fourth proportional to 191,978,318.92, 287,829,927.02 and 81,321,445.48 is: 121,923,901.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,978,318.92 : 287,829,927.02 = 81,321,445.48 : x
  2. Step 2: Convert to fraction form
    191,978,318.92/287,829,927.02 = 81,321,445.48/x
  3. Step 3: Cross multiply
    191,978,318.92x = 287,829,927.02 × 81,321,445.48
  4. Step 4: Simplify right side
    191,978,318.92x = 23,406,745,717,669,308
  5. Step 5: Solve for x
    x = 23,406,745,717,669,308/191,978,318.92
  6. Step 6: Final answer
    x = 121,923,901.87

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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.