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Finding the Fourth Proportional to 280,116.60, 420,174.90 and 93,128.10

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Solution

The fourth proportional to 280,116.60, 420,174.90 and 93,128.10 is: 139,692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,116.60 : 420,174.90 = 93,128.10 : x
  2. Step 2: Convert to fraction form
    280,116.60/420,174.90 = 93,128.10/x
  3. Step 3: Cross multiply
    280,116.60x = 420,174.90 × 93,128.10
  4. Step 4: Simplify right side
    280,116.60x = 39,130,090,104.69
  5. Step 5: Solve for x
    x = 39,130,090,104.69/280,116.60
  6. Step 6: Final answer
    x = 139,692.15

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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.