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Finding the Fourth Proportional to 131,057,985.60, 196,586,978.40 and 128,507,068.80

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Solution

The fourth proportional to 131,057,985.60, 196,586,978.40 and 128,507,068.80 is: 192,760,603.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,057,985.60 : 196,586,978.40 = 128,507,068.80 : x
  2. Step 2: Convert to fraction form
    131,057,985.60/196,586,978.40 = 128,507,068.80/x
  3. Step 3: Cross multiply
    131,057,985.60x = 196,586,978.40 × 128,507,068.80
  4. Step 4: Simplify right side
    131,057,985.60x = 25,262,816,358,432,916
  5. Step 5: Solve for x
    x = 25,262,816,358,432,916/131,057,985.60
  6. Step 6: Final answer
    x = 192,760,603.20

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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.