Home / 98,870.78-136,451.45-56,435.69

Finding the Fourth Proportional to 98,870.78, 136,451.45 and 56,435.69

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Solution

The fourth proportional to 98,870.78, 136,451.45 and 56,435.69 is: 77,886.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,870.78 : 136,451.45 = 56,435.69 : x
  2. Step 2: Convert to fraction form
    98,870.78/136,451.45 = 56,435.69/x
  3. Step 3: Cross multiply
    98,870.78x = 136,451.45 × 56,435.69
  4. Step 4: Simplify right side
    98,870.78x = 7,700,731,450.07
  5. Step 5: Solve for x
    x = 7,700,731,450.07/98,870.78
  6. Step 6: Final answer
    x = 77,886.83

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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.