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Finding the Fourth Proportional to 72,602,850.80, 108,904,276.20 and 56,163,609.20

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Solution

The fourth proportional to 72,602,850.80, 108,904,276.20 and 56,163,609.20 is: 84,245,413.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,602,850.80 : 108,904,276.20 = 56,163,609.20 : x
  2. Step 2: Convert to fraction form
    72,602,850.80/108,904,276.20 = 56,163,609.20/x
  3. Step 3: Cross multiply
    72,602,850.80x = 108,904,276.20 × 56,163,609.20
  4. Step 4: Simplify right side
    72,602,850.80x = 6,116,457,208,705,662
  5. Step 5: Solve for x
    x = 6,116,457,208,705,662/72,602,850.80
  6. Step 6: Final answer
    x = 84,245,413.80

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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.