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Finding the Fourth Proportional to 72,581,567.80, 108,872,351.70 and 56,142,326.20

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Solution

The fourth proportional to 72,581,567.80, 108,872,351.70 and 56,142,326.20 is: 84,213,489.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,567.80 : 108,872,351.70 = 56,142,326.20 : x
  2. Step 2: Convert to fraction form
    72,581,567.80/108,872,351.70 = 56,142,326.20/x
  3. Step 3: Cross multiply
    72,581,567.80x = 108,872,351.70 × 56,142,326.20
  4. Step 4: Simplify right side
    72,581,567.80x = 6,112,347,083,302,525
  5. Step 5: Solve for x
    x = 6,112,347,083,302,525/72,581,567.80
  6. Step 6: Final answer
    x = 84,213,489.30

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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.