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Finding the Fourth Proportional to 104,495.60, 156,781.80 and 42,172.40

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Solution

The fourth proportional to 104,495.60, 156,781.80 and 42,172.40 is: 63,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,495.60 : 156,781.80 = 42,172.40 : x
  2. Step 2: Convert to fraction form
    104,495.60/156,781.80 = 42,172.40/x
  3. Step 3: Cross multiply
    104,495.60x = 156,781.80 × 42,172.40
  4. Step 4: Simplify right side
    104,495.60x = 6,611,864,782.32
  5. Step 5: Solve for x
    x = 6,611,864,782.32/104,495.60
  6. Step 6: Final answer
    x = 63,274.10

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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.