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Finding the Fourth Proportional to 111,009.42, 153,006.44 and 84,143.34

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Solution

The fourth proportional to 111,009.42, 153,006.44 and 84,143.34 is: 115,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,009.42 : 153,006.44 = 84,143.34 : x
  2. Step 2: Convert to fraction form
    111,009.42/153,006.44 = 84,143.34/x
  3. Step 3: Cross multiply
    111,009.42x = 153,006.44 × 84,143.34
  4. Step 4: Simplify right side
    111,009.42x = 12,874,472,482.39
  5. Step 5: Solve for x
    x = 12,874,472,482.39/111,009.42
  6. Step 6: Final answer
    x = 115,976.40

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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.