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Finding the Fourth Proportional to 145,248.79, 217,811.26 and 55,276.15

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Solution

The fourth proportional to 145,248.79, 217,811.26 and 55,276.15 is: 82,890.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,248.79 : 217,811.26 = 55,276.15 : x
  2. Step 2: Convert to fraction form
    145,248.79/217,811.26 = 55,276.15/x
  3. Step 3: Cross multiply
    145,248.79x = 217,811.26 × 55,276.15
  4. Step 4: Simplify right side
    145,248.79x = 12,039,767,879.45
  5. Step 5: Solve for x
    x = 12,039,767,879.45/145,248.79
  6. Step 6: Final answer
    x = 82,890.66

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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.