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Finding the Fourth Proportional to 104,115.72, 143,679 and 56,368.98

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Solution

The fourth proportional to 104,115.72, 143,679 and 56,368.98 is: 77,788.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,115.72 : 143,679 = 56,368.98 : x
  2. Step 2: Convert to fraction form
    104,115.72/143,679 = 56,368.98/x
  3. Step 3: Cross multiply
    104,115.72x = 143,679 × 56,368.98
  4. Step 4: Simplify right side
    104,115.72x = 8,099,038,677.42
  5. Step 5: Solve for x
    x = 8,099,038,677.42/104,115.72
  6. Step 6: Final answer
    x = 77,788.82

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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.