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Finding the Fourth Proportional to 191,255.20, 287,012.40 and 124,532.80

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Solution

The fourth proportional to 191,255.20, 287,012.40 and 124,532.80 is: 186,883.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,255.20 : 287,012.40 = 124,532.80 : x
  2. Step 2: Convert to fraction form
    191,255.20/287,012.40 = 124,532.80/x
  3. Step 3: Cross multiply
    191,255.20x = 287,012.40 × 124,532.80
  4. Step 4: Simplify right side
    191,255.20x = 35,742,457,806.72
  5. Step 5: Solve for x
    x = 35,742,457,806.72/191,255.20
  6. Step 6: Final answer
    x = 186,883.59

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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.