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Finding the Fourth Proportional to 191,866.48, 287,800.26 and 67,178.32

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Solution

The fourth proportional to 191,866.48, 287,800.26 and 67,178.32 is: 100,767.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,866.48 : 287,800.26 = 67,178.32 : x
  2. Step 2: Convert to fraction form
    191,866.48/287,800.26 = 67,178.32/x
  3. Step 3: Cross multiply
    191,866.48x = 287,800.26 × 67,178.32
  4. Step 4: Simplify right side
    191,866.48x = 19,333,937,962.36
  5. Step 5: Solve for x
    x = 19,333,937,962.36/191,866.48
  6. Step 6: Final answer
    x = 100,767.67

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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.