Home / 257,831.20-386,746.80-139,733.20

Finding the Fourth Proportional to 257,831.20, 386,746.80 and 139,733.20

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Solution

The fourth proportional to 257,831.20, 386,746.80 and 139,733.20 is: 209,599.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,831.20 : 386,746.80 = 139,733.20 : x
  2. Step 2: Convert to fraction form
    257,831.20/386,746.80 = 139,733.20/x
  3. Step 3: Cross multiply
    257,831.20x = 386,746.80 × 139,733.20
  4. Step 4: Simplify right side
    257,831.20x = 54,041,367,953.76
  5. Step 5: Solve for x
    x = 54,041,367,953.76/257,831.20
  6. Step 6: Final answer
    x = 209,599.80

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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.