Home / 287,738,999.20-431,671,484.40-142,242,263.20

Finding the Fourth Proportional to 287,738,999.20, 431,671,484.40 and 142,242,263.20

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Solution

The fourth proportional to 287,738,999.20, 431,671,484.40 and 142,242,263.20 is: 213,394,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,738,999.20 : 431,671,484.40 = 142,242,263.20 : x
  2. Step 2: Convert to fraction form
    287,738,999.20/431,671,484.40 = 142,242,263.20/x
  3. Step 3: Cross multiply
    287,738,999.20x = 431,671,484.40 × 142,242,263.20
  4. Step 4: Simplify right side
    287,738,999.20x = 61,401,928,899,959,488
  5. Step 5: Solve for x
    x = 61,401,928,899,959,488/287,738,999.20
  6. Step 6: Final answer
    x = 213,394,531.40

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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.