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Finding the Fourth Proportional to 122,783.20, 169,439.12 and 69,068.20

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Solution

The fourth proportional to 122,783.20, 169,439.12 and 69,068.20 is: 95,313.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,783.20 : 169,439.12 = 69,068.20 : x
  2. Step 2: Convert to fraction form
    122,783.20/169,439.12 = 69,068.20/x
  3. Step 3: Cross multiply
    122,783.20x = 169,439.12 × 69,068.20
  4. Step 4: Simplify right side
    122,783.20x = 11,702,854,682.64
  5. Step 5: Solve for x
    x = 11,702,854,682.64/122,783.20
  6. Step 6: Final answer
    x = 95,313.16

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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.