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Finding the Fourth Proportional to 144,971.69, 200,061.65 and 81,312.89

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Solution

The fourth proportional to 144,971.69, 200,061.65 and 81,312.89 is: 112,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,971.69 : 200,061.65 = 81,312.89 : x
  2. Step 2: Convert to fraction form
    144,971.69/200,061.65 = 81,312.89/x
  3. Step 3: Cross multiply
    144,971.69x = 200,061.65 × 81,312.89
  4. Step 4: Simplify right side
    144,971.69x = 16,267,590,533.10
  5. Step 5: Solve for x
    x = 16,267,590,533.10/144,971.69
  6. Step 6: Final answer
    x = 112,212.19

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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.