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Finding the Fourth Proportional to 98,959.84, 136,549.74 and 56,509.36

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Solution

The fourth proportional to 98,959.84, 136,549.74 and 56,509.36 is: 77,974.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,959.84 : 136,549.74 = 56,509.36 : x
  2. Step 2: Convert to fraction form
    98,959.84/136,549.74 = 56,509.36/x
  3. Step 3: Cross multiply
    98,959.84x = 136,549.74 × 56,509.36
  4. Step 4: Simplify right side
    98,959.84x = 7,716,338,415.57
  5. Step 5: Solve for x
    x = 7,716,338,415.57/98,959.84
  6. Step 6: Final answer
    x = 77,974.44

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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.