Home / 105,664.16-145,831.50-65,390.92

Finding the Fourth Proportional to 105,664.16, 145,831.50 and 65,390.92

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Solution

The fourth proportional to 105,664.16, 145,831.50 and 65,390.92 is: 90,248.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,664.16 : 145,831.50 = 65,390.92 : x
  2. Step 2: Convert to fraction form
    105,664.16/145,831.50 = 65,390.92/x
  3. Step 3: Cross multiply
    105,664.16x = 145,831.50 × 65,390.92
  4. Step 4: Simplify right side
    105,664.16x = 9,536,055,585.40
  5. Step 5: Solve for x
    x = 9,536,055,585.40/105,664.16
  6. Step 6: Final answer
    x = 90,248.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.