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Finding the Fourth Proportional to 98,776.29, 136,274.59 and 64,803.68

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Solution

The fourth proportional to 98,776.29, 136,274.59 and 64,803.68 is: 89,405.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,776.29 : 136,274.59 = 64,803.68 : x
  2. Step 2: Convert to fraction form
    98,776.29/136,274.59 = 64,803.68/x
  3. Step 3: Cross multiply
    98,776.29x = 136,274.59 × 64,803.68
  4. Step 4: Simplify right side
    98,776.29x = 8,831,094,922.49
  5. Step 5: Solve for x
    x = 8,831,094,922.49/98,776.29
  6. Step 6: Final answer
    x = 89,405.01

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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.