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Finding the Fourth Proportional to 130,885.92, 180,617.63 and 79,983.77

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Solution

The fourth proportional to 130,885.92, 180,617.63 and 79,983.77 is: 110,374.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,885.92 : 180,617.63 = 79,983.77 : x
  2. Step 2: Convert to fraction form
    130,885.92/180,617.63 = 79,983.77/x
  3. Step 3: Cross multiply
    130,885.92x = 180,617.63 × 79,983.77
  4. Step 4: Simplify right side
    130,885.92x = 14,446,477,672.86
  5. Step 5: Solve for x
    x = 14,446,477,672.86/130,885.92
  6. Step 6: Final answer
    x = 110,374.57

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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.