Home / 121,521.15-182,117.70-81,426.15

Finding the Fourth Proportional to 121,521.15, 182,117.70 and 81,426.15

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Solution

The fourth proportional to 121,521.15, 182,117.70 and 81,426.15 is: 122,029.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,521.15 : 182,117.70 = 81,426.15 : x
  2. Step 2: Convert to fraction form
    121,521.15/182,117.70 = 81,426.15/x
  3. Step 3: Cross multiply
    121,521.15x = 182,117.70 × 81,426.15
  4. Step 4: Simplify right side
    121,521.15x = 14,829,143,157.86
  5. Step 5: Solve for x
    x = 14,829,143,157.86/121,521.15
  6. Step 6: Final answer
    x = 122,029.32

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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.