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Finding the Fourth Proportional to 72,646.80, 108,970.20 and 60,358.80

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Solution

The fourth proportional to 72,646.80, 108,970.20 and 60,358.80 is: 90,538.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,646.80 : 108,970.20 = 60,358.80 : x
  2. Step 2: Convert to fraction form
    72,646.80/108,970.20 = 60,358.80/x
  3. Step 3: Cross multiply
    72,646.80x = 108,970.20 × 60,358.80
  4. Step 4: Simplify right side
    72,646.80x = 6,577,310,507.76
  5. Step 5: Solve for x
    x = 6,577,310,507.76/72,646.80
  6. Step 6: Final answer
    x = 90,538.20

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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.