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Finding the Fourth Proportional to 70,810.15, 106,178.64 and 20,883.89

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Solution

The fourth proportional to 70,810.15, 106,178.64 and 20,883.89 is: 31,315.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,810.15 : 106,178.64 = 20,883.89 : x
  2. Step 2: Convert to fraction form
    70,810.15/106,178.64 = 20,883.89/x
  3. Step 3: Cross multiply
    70,810.15x = 106,178.64 × 20,883.89
  4. Step 4: Simplify right side
    70,810.15x = 2,217,423,038.11
  5. Step 5: Solve for x
    x = 2,217,423,038.11/70,810.15
  6. Step 6: Final answer
    x = 31,315.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.