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Finding the Fourth Proportional to 72,068.19, 108,102.30 and 36,985.47

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Solution

The fourth proportional to 72,068.19, 108,102.30 and 36,985.47 is: 55,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,068.19 : 108,102.30 = 36,985.47 : x
  2. Step 2: Convert to fraction form
    72,068.19/108,102.30 = 36,985.47/x
  3. Step 3: Cross multiply
    72,068.19x = 108,102.30 × 36,985.47
  4. Step 4: Simplify right side
    72,068.19x = 3,998,214,373.58
  5. Step 5: Solve for x
    x = 3,998,214,373.58/72,068.19
  6. Step 6: Final answer
    x = 55,478.21

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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.