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Finding the Fourth Proportional to 191,898,663.37, 287,879,826.20 and 67,369,009.43

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Solution

The fourth proportional to 191,898,663.37, 287,879,826.20 and 67,369,009.43 is: 101,064,688.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,898,663.37 : 287,879,826.20 = 67,369,009.43 : x
  2. Step 2: Convert to fraction form
    191,898,663.37/287,879,826.20 = 67,369,009.43/x
  3. Step 3: Cross multiply
    191,898,663.37x = 287,879,826.20 × 67,369,009.43
  4. Step 4: Simplify right side
    191,898,663.37x = 19,394,178,726,357,416
  5. Step 5: Solve for x
    x = 19,394,178,726,357,416/191,898,663.37
  6. Step 6: Final answer
    x = 101,064,688.97

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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.