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Finding the Fourth Proportional to 78,859.58, 117,685.84 and 70,445.09

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Solution

The fourth proportional to 78,859.58, 117,685.84 and 70,445.09 is: 105,128.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.58 : 117,685.84 = 70,445.09 : x
  2. Step 2: Convert to fraction form
    78,859.58/117,685.84 = 70,445.09/x
  3. Step 3: Cross multiply
    78,859.58x = 117,685.84 × 70,445.09
  4. Step 4: Simplify right side
    78,859.58x = 8,290,389,642.59
  5. Step 5: Solve for x
    x = 8,290,389,642.59/78,859.58
  6. Step 6: Final answer
    x = 105,128.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.