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Finding the Fourth Proportional to 98,915.99, 136,495.97 and 58,075.82

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Solution

The fourth proportional to 98,915.99, 136,495.97 and 58,075.82 is: 80,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,915.99 : 136,495.97 = 58,075.82 : x
  2. Step 2: Convert to fraction form
    98,915.99/136,495.97 = 58,075.82/x
  3. Step 3: Cross multiply
    98,915.99x = 136,495.97 × 58,075.82
  4. Step 4: Simplify right side
    98,915.99x = 7,927,114,411.59
  5. Step 5: Solve for x
    x = 7,927,114,411.59/98,915.99
  6. Step 6: Final answer
    x = 80,139.87

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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.