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Finding the Fourth Proportional to 72,608,860.80, 108,913,291.20 and 56,169,619.20

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Solution

The fourth proportional to 72,608,860.80, 108,913,291.20 and 56,169,619.20 is: 84,254,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,608,860.80 : 108,913,291.20 = 56,169,619.20 : x
  2. Step 2: Convert to fraction form
    72,608,860.80/108,913,291.20 = 56,169,619.20/x
  3. Step 3: Cross multiply
    72,608,860.80x = 108,913,291.20 × 56,169,619.20
  4. Step 4: Simplify right side
    72,608,860.80x = 6,117,618,092,522,712
  5. Step 5: Solve for x
    x = 6,117,618,092,522,712/72,608,860.80
  6. Step 6: Final answer
    x = 84,254,428.80

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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.