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Finding the Fourth Proportional to 71,869,458.40, 107,841,512.40 and 31,484,024.80

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Solution

The fourth proportional to 71,869,458.40, 107,841,512.40 and 31,484,024.80 is: 47,242,388.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,869,458.40 : 107,841,512.40 = 31,484,024.80 : x
  2. Step 2: Convert to fraction form
    71,869,458.40/107,841,512.40 = 31,484,024.80/x
  3. Step 3: Cross multiply
    71,869,458.40x = 107,841,512.40 × 31,484,024.80
  4. Step 4: Simplify right side
    71,869,458.40x = 3,395,284,850,871,108
  5. Step 5: Solve for x
    x = 3,395,284,850,871,108/71,869,458.40
  6. Step 6: Final answer
    x = 47,242,388.16

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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.