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Finding the Fourth Proportional to 117,383.63, 161,988.86 and 65,700.93

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Solution

The fourth proportional to 117,383.63, 161,988.86 and 65,700.93 is: 90,666.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,383.63 : 161,988.86 = 65,700.93 : x
  2. Step 2: Convert to fraction form
    117,383.63/161,988.86 = 65,700.93/x
  3. Step 3: Cross multiply
    117,383.63x = 161,988.86 × 65,700.93
  4. Step 4: Simplify right side
    117,383.63x = 10,642,818,423.14
  5. Step 5: Solve for x
    x = 10,642,818,423.14/117,383.63
  6. Step 6: Final answer
    x = 90,666.98

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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.