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Finding the Fourth Proportional to 103,980.60, 156,040.10 and 56,607.64

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Solution

The fourth proportional to 103,980.60, 156,040.10 and 56,607.64 is: 84,949.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,980.60 : 156,040.10 = 56,607.64 : x
  2. Step 2: Convert to fraction form
    103,980.60/156,040.10 = 56,607.64/x
  3. Step 3: Cross multiply
    103,980.60x = 156,040.10 × 56,607.64
  4. Step 4: Simplify right side
    103,980.60x = 8,833,061,806.36
  5. Step 5: Solve for x
    x = 8,833,061,806.36/103,980.60
  6. Step 6: Final answer
    x = 84,949.13

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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.