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Finding the Fourth Proportional to 98,211.90, 135,526.02 and 57,916.40

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Solution

The fourth proportional to 98,211.90, 135,526.02 and 57,916.40 is: 79,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,211.90 : 135,526.02 = 57,916.40 : x
  2. Step 2: Convert to fraction form
    98,211.90/135,526.02 = 57,916.40/x
  3. Step 3: Cross multiply
    98,211.90x = 135,526.02 × 57,916.40
  4. Step 4: Simplify right side
    98,211.90x = 7,849,179,184.73
  5. Step 5: Solve for x
    x = 7,849,179,184.73/98,211.90
  6. Step 6: Final answer
    x = 79,920.86

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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.