Home / 326,420.07-489,573.68-86,535.56

Finding the Fourth Proportional to 326,420.07, 489,573.68 and 86,535.56

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Solution

The fourth proportional to 326,420.07, 489,573.68 and 86,535.56 is: 129,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,420.07 : 489,573.68 = 86,535.56 : x
  2. Step 2: Convert to fraction form
    326,420.07/489,573.68 = 86,535.56/x
  3. Step 3: Cross multiply
    326,420.07x = 489,573.68 × 86,535.56
  4. Step 4: Simplify right side
    326,420.07x = 42,365,529,679.51
  5. Step 5: Solve for x
    x = 42,365,529,679.51/326,420.07
  6. Step 6: Final answer
    x = 129,788.37

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1.5x scale

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.