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Finding the Fourth Proportional to 156,620.24, 216,240 and 92,978.48

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Solution

The fourth proportional to 156,620.24, 216,240 and 92,978.48 is: 128,372.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,620.24 : 216,240 = 92,978.48 : x
  2. Step 2: Convert to fraction form
    156,620.24/216,240 = 92,978.48/x
  3. Step 3: Cross multiply
    156,620.24x = 216,240 × 92,978.48
  4. Step 4: Simplify right side
    156,620.24x = 20,105,666,515.20
  5. Step 5: Solve for x
    x = 20,105,666,515.20/156,620.24
  6. Step 6: Final answer
    x = 128,372.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.