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Finding the Fourth Proportional to 191,915.12, 264,842.08 and 105,879.45

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Solution

The fourth proportional to 191,915.12, 264,842.08 and 105,879.45 is: 146,113.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,915.12 : 264,842.08 = 105,879.45 : x
  2. Step 2: Convert to fraction form
    191,915.12/264,842.08 = 105,879.45/x
  3. Step 3: Cross multiply
    191,915.12x = 264,842.08 × 105,879.45
  4. Step 4: Simplify right side
    191,915.12x = 28,041,333,767.26
  5. Step 5: Solve for x
    x = 28,041,333,767.26/191,915.12
  6. Step 6: Final answer
    x = 146,113.21

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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.