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Finding the Fourth Proportional to 113,861.04, 157,128.40 and 63,560

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Solution

The fourth proportional to 113,861.04, 157,128.40 and 63,560 is: 87,712.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,861.04 : 157,128.40 = 63,560 : x
  2. Step 2: Convert to fraction form
    113,861.04/157,128.40 = 63,560/x
  3. Step 3: Cross multiply
    113,861.04x = 157,128.40 × 63,560
  4. Step 4: Simplify right side
    113,861.04x = 9,987,081,104
  5. Step 5: Solve for x
    x = 9,987,081,104/113,861.04
  6. Step 6: Final answer
    x = 87,712.89

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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.