Home / 98,639.68-136,115.76-56,190.40

Finding the Fourth Proportional to 98,639.68, 136,115.76 and 56,190.40

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Solution

The fourth proportional to 98,639.68, 136,115.76 and 56,190.40 is: 77,538.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,639.68 : 136,115.76 = 56,190.40 : x
  2. Step 2: Convert to fraction form
    98,639.68/136,115.76 = 56,190.40/x
  3. Step 3: Cross multiply
    98,639.68x = 136,115.76 × 56,190.40
  4. Step 4: Simplify right side
    98,639.68x = 7,648,399,000.70
  5. Step 5: Solve for x
    x = 7,648,399,000.70/98,639.68
  6. Step 6: Final answer
    x = 77,538.77

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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.