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Finding the Fourth Proportional to 139,060.53, 208,074.08 and 82,931.18

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Solution

The fourth proportional to 139,060.53, 208,074.08 and 82,931.18 is: 124,088.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,060.53 : 208,074.08 = 82,931.18 : x
  2. Step 2: Convert to fraction form
    139,060.53/208,074.08 = 82,931.18/x
  3. Step 3: Cross multiply
    139,060.53x = 208,074.08 × 82,931.18
  4. Step 4: Simplify right side
    139,060.53x = 17,255,828,148.77
  5. Step 5: Solve for x
    x = 17,255,828,148.77/139,060.53
  6. Step 6: Final answer
    x = 124,088.61

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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.