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Finding the Fourth Proportional to 155,406.19, 233,109.35 and 69,917.21

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Solution

The fourth proportional to 155,406.19, 233,109.35 and 69,917.21 is: 104,875.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,406.19 : 233,109.35 = 69,917.21 : x
  2. Step 2: Convert to fraction form
    155,406.19/233,109.35 = 69,917.21/x
  3. Step 3: Cross multiply
    155,406.19x = 233,109.35 × 69,917.21
  4. Step 4: Simplify right side
    155,406.19x = 16,298,355,376.91
  5. Step 5: Solve for x
    x = 16,298,355,376.91/155,406.19
  6. Step 6: Final answer
    x = 104,875.84

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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.