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Finding the Fourth Proportional to 191,479.80, 264,237.36 and 105,438.11

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Solution

The fourth proportional to 191,479.80, 264,237.36 and 105,438.11 is: 145,501.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,479.80 : 264,237.36 = 105,438.11 : x
  2. Step 2: Convert to fraction form
    191,479.80/264,237.36 = 105,438.11/x
  3. Step 3: Cross multiply
    191,479.80x = 264,237.36 × 105,438.11
  4. Step 4: Simplify right side
    191,479.80x = 27,860,686,508.60
  5. Step 5: Solve for x
    x = 27,860,686,508.60/191,479.80
  6. Step 6: Final answer
    x = 145,501.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.