Home / 326,664,938.88-489,971,695.68-142,428,067.20

Finding the Fourth Proportional to 326,664,938.88, 489,971,695.68 and 142,428,067.20

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Solution

The fourth proportional to 326,664,938.88, 489,971,695.68 and 142,428,067.20 is: 213,630,889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,664,938.88 : 489,971,695.68 = 142,428,067.20 : x
  2. Step 2: Convert to fraction form
    326,664,938.88/489,971,695.68 = 142,428,067.20/x
  3. Step 3: Cross multiply
    326,664,938.88x = 489,971,695.68 × 142,428,067.20
  4. Step 4: Simplify right side
    326,664,938.88x = 69,785,721,598,408,984
  5. Step 5: Solve for x
    x = 69,785,721,598,408,984/326,664,938.88
  6. Step 6: Final answer
    x = 213,630,889.92

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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.