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Finding the Fourth Proportional to 103,840.10, 155,798.55 and 100,000.10

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Solution

The fourth proportional to 103,840.10, 155,798.55 and 100,000.10 is: 150,037.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,840.10 : 155,798.55 = 100,000.10 : x
  2. Step 2: Convert to fraction form
    103,840.10/155,798.55 = 100,000.10/x
  3. Step 3: Cross multiply
    103,840.10x = 155,798.55 × 100,000.10
  4. Step 4: Simplify right side
    103,840.10x = 15,579,870,579.86
  5. Step 5: Solve for x
    x = 15,579,870,579.86/103,840.10
  6. Step 6: Final answer
    x = 150,037.13

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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.