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Finding the Fourth Proportional to 112,893.32, 169,305.42 and 78,056.84

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Solution

The fourth proportional to 112,893.32, 169,305.42 and 78,056.84 is: 117,061.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,893.32 : 169,305.42 = 78,056.84 : x
  2. Step 2: Convert to fraction form
    112,893.32/169,305.42 = 78,056.84/x
  3. Step 3: Cross multiply
    112,893.32x = 169,305.42 × 78,056.84
  4. Step 4: Simplify right side
    112,893.32x = 13,215,446,080.07
  5. Step 5: Solve for x
    x = 13,215,446,080.07/112,893.32
  6. Step 6: Final answer
    x = 117,061.36

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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.