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Finding the Fourth Proportional to 103,820.60, 155,730.90 and 102,836.45

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Solution

The fourth proportional to 103,820.60, 155,730.90 and 102,836.45 is: 154,254.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,820.60 : 155,730.90 = 102,836.45 : x
  2. Step 2: Convert to fraction form
    103,820.60/155,730.90 = 102,836.45/x
  3. Step 3: Cross multiply
    103,820.60x = 155,730.90 × 102,836.45
  4. Step 4: Simplify right side
    103,820.60x = 16,014,812,911.31
  5. Step 5: Solve for x
    x = 16,014,812,911.31/103,820.60
  6. Step 6: Final answer
    x = 154,254.68

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1.5x scale

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.