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Finding the Fourth Proportional to 102,600.10, 153,550.05 and 85,978.90

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Solution

The fourth proportional to 102,600.10, 153,550.05 and 85,978.90 is: 128,674.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,600.10 : 153,550.05 = 85,978.90 : x
  2. Step 2: Convert to fraction form
    102,600.10/153,550.05 = 85,978.90/x
  3. Step 3: Cross multiply
    102,600.10x = 153,550.05 × 85,978.90
  4. Step 4: Simplify right side
    102,600.10x = 13,202,064,393.95
  5. Step 5: Solve for x
    x = 13,202,064,393.95/102,600.10
  6. Step 6: Final answer
    x = 128,674.97

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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.