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Finding the Fourth Proportional to 112,937.60, 169,600.80 and 79,889.60

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Solution

The fourth proportional to 112,937.60, 169,600.80 and 79,889.60 is: 119,971.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,937.60 : 169,600.80 = 79,889.60 : x
  2. Step 2: Convert to fraction form
    112,937.60/169,600.80 = 79,889.60/x
  3. Step 3: Cross multiply
    112,937.60x = 169,600.80 × 79,889.60
  4. Step 4: Simplify right side
    112,937.60x = 13,549,340,071.68
  5. Step 5: Solve for x
    x = 13,549,340,071.68/112,937.60
  6. Step 6: Final answer
    x = 119,971.91

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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.