Home / 419,905,390.60-629,858,085.90-128,817,440.20

Finding the Fourth Proportional to 419,905,390.60, 629,858,085.90 and 128,817,440.20

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Solution

The fourth proportional to 419,905,390.60, 629,858,085.90 and 128,817,440.20 is: 193,226,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,390.60 : 629,858,085.90 = 128,817,440.20 : x
  2. Step 2: Convert to fraction form
    419,905,390.60/629,858,085.90 = 128,817,440.20/x
  3. Step 3: Cross multiply
    419,905,390.60x = 629,858,085.90 × 128,817,440.20
  4. Step 4: Simplify right side
    419,905,390.60x = 81,136,706,314,909,712
  5. Step 5: Solve for x
    x = 81,136,706,314,909,712/419,905,390.60
  6. Step 6: Final answer
    x = 193,226,160.30

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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.