Home / 129,586.60-178,831.29-72,224.32

Finding the Fourth Proportional to 129,586.60, 178,831.29 and 72,224.32

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Solution

The fourth proportional to 129,586.60, 178,831.29 and 72,224.32 is: 99,670.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.60 : 178,831.29 = 72,224.32 : x
  2. Step 2: Convert to fraction form
    129,586.60/178,831.29 = 72,224.32/x
  3. Step 3: Cross multiply
    129,586.60x = 178,831.29 × 72,224.32
  4. Step 4: Simplify right side
    129,586.60x = 12,915,968,809.35
  5. Step 5: Solve for x
    x = 12,915,968,809.35/129,586.60
  6. Step 6: Final answer
    x = 99,670.56

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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.