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Finding the Fourth Proportional to 155,424, 214,485.12 and 88,368.96

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Solution

The fourth proportional to 155,424, 214,485.12 and 88,368.96 is: 121,949.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,424 : 214,485.12 = 88,368.96 : x
  2. Step 2: Convert to fraction form
    155,424/214,485.12 = 88,368.96/x
  3. Step 3: Cross multiply
    155,424x = 214,485.12 × 88,368.96
  4. Step 4: Simplify right side
    155,424x = 18,953,826,989.88
  5. Step 5: Solve for x
    x = 18,953,826,989.88/155,424
  6. Step 6: Final answer
    x = 121,949.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.