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Finding the Fourth Proportional to 71,009,979.80, 106,514,969.70 and 56,661,072.80

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Solution

The fourth proportional to 71,009,979.80, 106,514,969.70 and 56,661,072.80 is: 84,991,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009,979.80 : 106,514,969.70 = 56,661,072.80 : x
  2. Step 2: Convert to fraction form
    71,009,979.80/106,514,969.70 = 56,661,072.80/x
  3. Step 3: Cross multiply
    71,009,979.80x = 106,514,969.70 × 56,661,072.80
  4. Step 4: Simplify right side
    71,009,979.80x = 6,035,252,452,461,494
  5. Step 5: Solve for x
    x = 6,035,252,452,461,494/71,009,979.80
  6. Step 6: Final answer
    x = 84,991,609.20

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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.