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Finding the Fourth Proportional to 191,291.40, 287,046.45 and 73,047.60

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Solution

The fourth proportional to 191,291.40, 287,046.45 and 73,047.60 is: 109,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,291.40 : 287,046.45 = 73,047.60 : x
  2. Step 2: Convert to fraction form
    191,291.40/287,046.45 = 73,047.60/x
  3. Step 3: Cross multiply
    191,291.40x = 287,046.45 × 73,047.60
  4. Step 4: Simplify right side
    191,291.40x = 20,968,054,261.02
  5. Step 5: Solve for x
    x = 20,968,054,261.02/191,291.40
  6. Step 6: Final answer
    x = 109,613.16

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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.