Home / 129,586.85-178,831.64-72,224.57

Finding the Fourth Proportional to 129,586.85, 178,831.64 and 72,224.57

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Solution

The fourth proportional to 129,586.85, 178,831.64 and 72,224.57 is: 99,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.85 : 178,831.64 = 72,224.57 : x
  2. Step 2: Convert to fraction form
    129,586.85/178,831.64 = 72,224.57/x
  3. Step 3: Cross multiply
    129,586.85x = 178,831.64 × 72,224.57
  4. Step 4: Simplify right side
    129,586.85x = 12,916,038,301.39
  5. Step 5: Solve for x
    x = 12,916,038,301.39/129,586.85
  6. Step 6: Final answer
    x = 99,670.90

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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.