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Finding the Fourth Proportional to 191,566.20, 287,349.30 and 74,830.20

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Solution

The fourth proportional to 191,566.20, 287,349.30 and 74,830.20 is: 112,245.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,566.20 : 287,349.30 = 74,830.20 : x
  2. Step 2: Convert to fraction form
    191,566.20/287,349.30 = 74,830.20/x
  3. Step 3: Cross multiply
    191,566.20x = 287,349.30 × 74,830.20
  4. Step 4: Simplify right side
    191,566.20x = 21,502,405,588.86
  5. Step 5: Solve for x
    x = 21,502,405,588.86/191,566.20
  6. Step 6: Final answer
    x = 112,245.30

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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.