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Finding the Fourth Proportional to 115,703.61, 159,753.74 and 90,238.42

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Solution

The fourth proportional to 115,703.61, 159,753.74 and 90,238.42 is: 124,593.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,703.61 : 159,753.74 = 90,238.42 : x
  2. Step 2: Convert to fraction form
    115,703.61/159,753.74 = 90,238.42/x
  3. Step 3: Cross multiply
    115,703.61x = 159,753.74 × 90,238.42
  4. Step 4: Simplify right side
    115,703.61x = 14,415,924,835.19
  5. Step 5: Solve for x
    x = 14,415,924,835.19/115,703.61
  6. Step 6: Final answer
    x = 124,593.57

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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.