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Finding the Fourth Proportional to 152,640.81, 210,656.96 and 84,679.71

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Solution

The fourth proportional to 152,640.81, 210,656.96 and 84,679.71 is: 116,865.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,640.81 : 210,656.96 = 84,679.71 : x
  2. Step 2: Convert to fraction form
    152,640.81/210,656.96 = 84,679.71/x
  3. Step 3: Cross multiply
    152,640.81x = 210,656.96 × 84,679.71
  4. Step 4: Simplify right side
    152,640.81x = 17,838,369,858.88
  5. Step 5: Solve for x
    x = 17,838,369,858.88/152,640.81
  6. Step 6: Final answer
    x = 116,865.01

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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.