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Finding the Fourth Proportional to 154,437.51, 213,111.99 and 86,438.91

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Solution

The fourth proportional to 154,437.51, 213,111.99 and 86,438.91 is: 119,279.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,437.51 : 213,111.99 = 86,438.91 : x
  2. Step 2: Convert to fraction form
    154,437.51/213,111.99 = 86,438.91/x
  3. Step 3: Cross multiply
    154,437.51x = 213,111.99 × 86,438.91
  4. Step 4: Simplify right side
    154,437.51x = 18,421,168,123.53
  5. Step 5: Solve for x
    x = 18,421,168,123.53/154,437.51
  6. Step 6: Final answer
    x = 119,279.11

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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.