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Finding the Fourth Proportional to 83,145.76, 124,718.57 and 26,985.86

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Solution

The fourth proportional to 83,145.76, 124,718.57 and 26,985.86 is: 40,478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,145.76 : 124,718.57 = 26,985.86 : x
  2. Step 2: Convert to fraction form
    83,145.76/124,718.57 = 26,985.86/x
  3. Step 3: Cross multiply
    83,145.76x = 124,718.57 × 26,985.86
  4. Step 4: Simplify right side
    83,145.76x = 3,365,637,679.79
  5. Step 5: Solve for x
    x = 3,365,637,679.79/83,145.76
  6. Step 6: Final answer
    x = 40,478.77

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1.5x scale

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.