Home / 390,906,652.80-586,432,062.72-128,605,972.80

Finding the Fourth Proportional to 390,906,652.80, 586,432,062.72 and 128,605,972.80

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Solution

The fourth proportional to 390,906,652.80, 586,432,062.72 and 128,605,972.80 is: 192,932,674.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,906,652.80 : 586,432,062.72 = 128,605,972.80 : x
  2. Step 2: Convert to fraction form
    390,906,652.80/586,432,062.72 = 128,605,972.80/x
  3. Step 3: Cross multiply
    390,906,652.80x = 586,432,062.72 × 128,605,972.80
  4. Step 4: Simplify right side
    390,906,652.80x = 75,418,665,907,216,208
  5. Step 5: Solve for x
    x = 75,418,665,907,216,208/390,906,652.80
  6. Step 6: Final answer
    x = 192,932,674.25

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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.