Home / 429,120,987.60-643,681,481.40-156,500,648.40

Finding the Fourth Proportional to 429,120,987.60, 643,681,481.40 and 156,500,648.40

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Solution

The fourth proportional to 429,120,987.60, 643,681,481.40 and 156,500,648.40 is: 234,750,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,120,987.60 : 643,681,481.40 = 156,500,648.40 : x
  2. Step 2: Convert to fraction form
    429,120,987.60/643,681,481.40 = 156,500,648.40/x
  3. Step 3: Cross multiply
    429,120,987.60x = 643,681,481.40 × 156,500,648.40
  4. Step 4: Simplify right side
    429,120,987.60x = 100,736,569,202,172,544
  5. Step 5: Solve for x
    x = 100,736,569,202,172,544/429,120,987.60
  6. Step 6: Final answer
    x = 234,750,972.60

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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.