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Finding the Fourth Proportional to 103,502.80, 142,831.92 and 65,254.60

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Solution

The fourth proportional to 103,502.80, 142,831.92 and 65,254.60 is: 90,050.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,502.80 : 142,831.92 = 65,254.60 : x
  2. Step 2: Convert to fraction form
    103,502.80/142,831.92 = 65,254.60/x
  3. Step 3: Cross multiply
    103,502.80x = 142,831.92 × 65,254.60
  4. Step 4: Simplify right side
    103,502.80x = 9,320,439,806.83
  5. Step 5: Solve for x
    x = 9,320,439,806.83/103,502.80
  6. Step 6: Final answer
    x = 90,050.12

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1.5x scale

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.