Home / 287,738,999.70-431,671,485.15-142,242,263.70

Finding the Fourth Proportional to 287,738,999.70, 431,671,485.15 and 142,242,263.70

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Solution

The fourth proportional to 287,738,999.70, 431,671,485.15 and 142,242,263.70 is: 213,394,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,738,999.70 : 431,671,485.15 = 142,242,263.70 : x
  2. Step 2: Convert to fraction form
    287,738,999.70/431,671,485.15 = 142,242,263.70/x
  3. Step 3: Cross multiply
    287,738,999.70x = 431,671,485.15 × 142,242,263.70
  4. Step 4: Simplify right side
    287,738,999.70x = 61,401,929,222,476,928
  5. Step 5: Solve for x
    x = 61,401,929,222,476,928/287,738,999.70
  6. Step 6: Final answer
    x = 213,394,532.15

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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.