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Finding the Fourth Proportional to 112,129.20, 168,193.80 and 70,657.20

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Solution

The fourth proportional to 112,129.20, 168,193.80 and 70,657.20 is: 105,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,129.20 : 168,193.80 = 70,657.20 : x
  2. Step 2: Convert to fraction form
    112,129.20/168,193.80 = 70,657.20/x
  3. Step 3: Cross multiply
    112,129.20x = 168,193.80 × 70,657.20
  4. Step 4: Simplify right side
    112,129.20x = 11,884,102,965.36
  5. Step 5: Solve for x
    x = 11,884,102,965.36/112,129.20
  6. Step 6: Final answer
    x = 105,985.80

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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.