Home / 154,817.72-213,631.38-86,820.71

Finding the Fourth Proportional to 154,817.72, 213,631.38 and 86,820.71

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Solution

The fourth proportional to 154,817.72, 213,631.38 and 86,820.71 is: 119,802.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,817.72 : 213,631.38 = 86,820.71 : x
  2. Step 2: Convert to fraction form
    154,817.72/213,631.38 = 86,820.71/x
  3. Step 3: Cross multiply
    154,817.72x = 213,631.38 × 86,820.71
  4. Step 4: Simplify right side
    154,817.72x = 18,547,626,777.54
  5. Step 5: Solve for x
    x = 18,547,626,777.54/154,817.72
  6. Step 6: Final answer
    x = 119,802.99

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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.