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Finding the Fourth Proportional to 71,009,990.80, 106,514,986.20 and 56,661,083.80

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Solution

The fourth proportional to 71,009,990.80, 106,514,986.20 and 56,661,083.80 is: 84,991,625.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009,990.80 : 106,514,986.20 = 56,661,083.80 : x
  2. Step 2: Convert to fraction form
    71,009,990.80/106,514,986.20 = 56,661,083.80/x
  3. Step 3: Cross multiply
    71,009,990.80x = 106,514,986.20 × 56,661,083.80
  4. Step 4: Simplify right side
    71,009,990.80x = 6,035,254,559,034,043
  5. Step 5: Solve for x
    x = 6,035,254,559,034,043/71,009,990.80
  6. Step 6: Final answer
    x = 84,991,625.70

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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.