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Finding the Fourth Proportional to 77,953.56, 107,575.58 and 42,143.56

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Solution

The fourth proportional to 77,953.56, 107,575.58 and 42,143.56 is: 58,157.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,953.56 : 107,575.58 = 42,143.56 : x
  2. Step 2: Convert to fraction form
    77,953.56/107,575.58 = 42,143.56/x
  3. Step 3: Cross multiply
    77,953.56x = 107,575.58 × 42,143.56
  4. Step 4: Simplify right side
    77,953.56x = 4,533,617,910.26
  5. Step 5: Solve for x
    x = 4,533,617,910.26/77,953.56
  6. Step 6: Final answer
    x = 58,157.93

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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.