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Finding the Fourth Proportional to 71,009,991.80, 106,514,987.70 and 56,661,084.80

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Solution

The fourth proportional to 71,009,991.80, 106,514,987.70 and 56,661,084.80 is: 84,991,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009,991.80 : 106,514,987.70 = 56,661,084.80 : x
  2. Step 2: Convert to fraction form
    71,009,991.80/106,514,987.70 = 56,661,084.80/x
  3. Step 3: Cross multiply
    71,009,991.80x = 106,514,987.70 × 56,661,084.80
  4. Step 4: Simplify right side
    71,009,991.80x = 6,035,254,750,540,657
  5. Step 5: Solve for x
    x = 6,035,254,750,540,657/71,009,991.80
  6. Step 6: Final answer
    x = 84,991,627.20

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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.