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Finding the Fourth Proportional to 611,363.60, 917,085.90 and 162,078.20

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Solution

The fourth proportional to 611,363.60, 917,085.90 and 162,078.20 is: 243,128.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,363.60 : 917,085.90 = 162,078.20 : x
  2. Step 2: Convert to fraction form
    611,363.60/917,085.90 = 162,078.20/x
  3. Step 3: Cross multiply
    611,363.60x = 917,085.90 × 162,078.20
  4. Step 4: Simplify right side
    611,363.60x = 148,639,631,917.38
  5. Step 5: Solve for x
    x = 148,639,631,917.38/611,363.60
  6. Step 6: Final answer
    x = 243,128.04

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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.