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Finding the Fourth Proportional to 96,436.80, 144,655.20 and 86,619.60

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Solution

The fourth proportional to 96,436.80, 144,655.20 and 86,619.60 is: 129,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,436.80 : 144,655.20 = 86,619.60 : x
  2. Step 2: Convert to fraction form
    96,436.80/144,655.20 = 86,619.60/x
  3. Step 3: Cross multiply
    96,436.80x = 144,655.20 × 86,619.60
  4. Step 4: Simplify right side
    96,436.80x = 12,529,975,561.92
  5. Step 5: Solve for x
    x = 12,529,975,561.92/96,436.80
  6. Step 6: Final answer
    x = 129,929.40

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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.