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Finding the Fourth Proportional to 191,085.68, 286,631.40 and 72,763.58

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Solution

The fourth proportional to 191,085.68, 286,631.40 and 72,763.58 is: 109,146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,085.68 : 286,631.40 = 72,763.58 : x
  2. Step 2: Convert to fraction form
    191,085.68/286,631.40 = 72,763.58/x
  3. Step 3: Cross multiply
    191,085.68x = 286,631.40 × 72,763.58
  4. Step 4: Simplify right side
    191,085.68x = 20,856,326,804.41
  5. Step 5: Solve for x
    x = 20,856,326,804.41/191,085.68
  6. Step 6: Final answer
    x = 109,146.47

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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.