Home / 98,678.79-136,192.07-64,785.61

Finding the Fourth Proportional to 98,678.79, 136,192.07 and 64,785.61

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Solution

The fourth proportional to 98,678.79, 136,192.07 and 64,785.61 is: 89,414.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,678.79 : 136,192.07 = 64,785.61 : x
  2. Step 2: Convert to fraction form
    98,678.79/136,192.07 = 64,785.61/x
  3. Step 3: Cross multiply
    98,678.79x = 136,192.07 × 64,785.61
  4. Step 4: Simplify right side
    98,678.79x = 8,823,286,332.11
  5. Step 5: Solve for x
    x = 8,823,286,332.11/98,678.79
  6. Step 6: Final answer
    x = 89,414.21

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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.