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Finding the Fourth Proportional to 190,380.60, 285,225.30 and 155,129.40

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Solution

The fourth proportional to 190,380.60, 285,225.30 and 155,129.40 is: 232,412.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,380.60 : 285,225.30 = 155,129.40 : x
  2. Step 2: Convert to fraction form
    190,380.60/285,225.30 = 155,129.40/x
  3. Step 3: Cross multiply
    190,380.60x = 285,225.30 × 155,129.40
  4. Step 4: Simplify right side
    190,380.60x = 44,246,829,653.82
  5. Step 5: Solve for x
    x = 44,246,829,653.82/190,380.60
  6. Step 6: Final answer
    x = 232,412.49

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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.