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Finding the Fourth Proportional to 145,420.32, 218,128.83 and 56,736.11

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Solution

The fourth proportional to 145,420.32, 218,128.83 and 56,736.11 is: 85,103.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,420.32 : 218,128.83 = 56,736.11 : x
  2. Step 2: Convert to fraction form
    145,420.32/218,128.83 = 56,736.11/x
  3. Step 3: Cross multiply
    145,420.32x = 218,128.83 × 56,736.11
  4. Step 4: Simplify right side
    145,420.32x = 12,375,781,625.61
  5. Step 5: Solve for x
    x = 12,375,781,625.61/145,420.32
  6. Step 6: Final answer
    x = 85,103.52

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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.