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Finding the Fourth Proportional to 145,316.58, 200,554.80 and 81,653

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Solution

The fourth proportional to 145,316.58, 200,554.80 and 81,653 is: 112,691.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,316.58 : 200,554.80 = 81,653 : x
  2. Step 2: Convert to fraction form
    145,316.58/200,554.80 = 81,653/x
  3. Step 3: Cross multiply
    145,316.58x = 200,554.80 × 81,653
  4. Step 4: Simplify right side
    145,316.58x = 16,375,901,084.40
  5. Step 5: Solve for x
    x = 16,375,901,084.40/145,316.58
  6. Step 6: Final answer
    x = 112,691.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.