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Finding the Fourth Proportional to 72,001.80, 108,051.30 and 40,411.80

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Solution

The fourth proportional to 72,001.80, 108,051.30 and 40,411.80 is: 60,644.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,001.80 : 108,051.30 = 40,411.80 : x
  2. Step 2: Convert to fraction form
    72,001.80/108,051.30 = 40,411.80/x
  3. Step 3: Cross multiply
    72,001.80x = 108,051.30 × 40,411.80
  4. Step 4: Simplify right side
    72,001.80x = 4,366,547,525.34
  5. Step 5: Solve for x
    x = 4,366,547,525.34/72,001.80
  6. Step 6: Final answer
    x = 60,644.98

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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.