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Finding the Fourth Proportional to 130,389.66, 179,931.50 and 80,078.94

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Solution

The fourth proportional to 130,389.66, 179,931.50 and 80,078.94 is: 110,505.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,389.66 : 179,931.50 = 80,078.94 : x
  2. Step 2: Convert to fraction form
    130,389.66/179,931.50 = 80,078.94/x
  3. Step 3: Cross multiply
    130,389.66x = 179,931.50 × 80,078.94
  4. Step 4: Simplify right side
    130,389.66x = 14,408,723,792.61
  5. Step 5: Solve for x
    x = 14,408,723,792.61/130,389.66
  6. Step 6: Final answer
    x = 110,505.11

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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.