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Finding the Fourth Proportional to 201,863,140.80, 302,936,428.80 and 86,930,167.20

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Solution

The fourth proportional to 201,863,140.80, 302,936,428.80 and 86,930,167.20 is: 130,456,279.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,863,140.80 : 302,936,428.80 = 86,930,167.20 : x
  2. Step 2: Convert to fraction form
    201,863,140.80/302,936,428.80 = 86,930,167.20/x
  3. Step 3: Cross multiply
    201,863,140.80x = 302,936,428.80 × 86,930,167.20
  4. Step 4: Simplify right side
    201,863,140.80x = 26,334,314,406,554,896
  5. Step 5: Solve for x
    x = 26,334,314,406,554,896/201,863,140.80
  6. Step 6: Final answer
    x = 130,456,279.94

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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.