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Finding the Fourth Proportional to 191,707.12, 287,688.66 and 67,048.12

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Solution

The fourth proportional to 191,707.12, 287,688.66 and 67,048.12 is: 100,616.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,707.12 : 287,688.66 = 67,048.12 : x
  2. Step 2: Convert to fraction form
    191,707.12/287,688.66 = 67,048.12/x
  3. Step 3: Cross multiply
    191,707.12x = 287,688.66 × 67,048.12
  4. Step 4: Simplify right side
    191,707.12x = 19,288,983,798.32
  5. Step 5: Solve for x
    x = 19,288,983,798.32/191,707.12
  6. Step 6: Final answer
    x = 100,616.94

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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.