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Finding the Fourth Proportional to 72,577,687.20, 108,866,530.80 and 18,724,999.20

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Solution

The fourth proportional to 72,577,687.20, 108,866,530.80 and 18,724,999.20 is: 28,087,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,577,687.20 : 108,866,530.80 = 18,724,999.20 : x
  2. Step 2: Convert to fraction form
    72,577,687.20/108,866,530.80 = 18,724,999.20/x
  3. Step 3: Cross multiply
    72,577,687.20x = 108,866,530.80 × 18,724,999.20
  4. Step 4: Simplify right side
    72,577,687.20x = 2,038,525,702,136,775.25
  5. Step 5: Solve for x
    x = 2,038,525,702,136,775.25/72,577,687.20
  6. Step 6: Final answer
    x = 28,087,498.80

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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.