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Finding the Fourth Proportional to 112,697.60, 168,700.80 and 65,811.20

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Solution

The fourth proportional to 112,697.60, 168,700.80 and 65,811.20 is: 98,514.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,697.60 : 168,700.80 = 65,811.20 : x
  2. Step 2: Convert to fraction form
    112,697.60/168,700.80 = 65,811.20/x
  3. Step 3: Cross multiply
    112,697.60x = 168,700.80 × 65,811.20
  4. Step 4: Simplify right side
    112,697.60x = 11,102,402,088.96
  5. Step 5: Solve for x
    x = 11,102,402,088.96/112,697.60
  6. Step 6: Final answer
    x = 98,514.98

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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.