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Finding the Fourth Proportional to 154,368.73, 213,038.81 and 86,391.91

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Solution

The fourth proportional to 154,368.73, 213,038.81 and 86,391.91 is: 119,226.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,368.73 : 213,038.81 = 86,391.91 : x
  2. Step 2: Convert to fraction form
    154,368.73/213,038.81 = 86,391.91/x
  3. Step 3: Cross multiply
    154,368.73x = 213,038.81 × 86,391.91
  4. Step 4: Simplify right side
    154,368.73x = 18,404,829,700.03
  5. Step 5: Solve for x
    x = 18,404,829,700.03/154,368.73
  6. Step 6: Final answer
    x = 119,226.41

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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.