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Finding the Fourth Proportional to 123,008.90, 169,673.54 and 77,606.78

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Solution

The fourth proportional to 123,008.90, 169,673.54 and 77,606.78 is: 107,047.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,008.90 : 169,673.54 = 77,606.78 : x
  2. Step 2: Convert to fraction form
    123,008.90/169,673.54 = 77,606.78/x
  3. Step 3: Cross multiply
    123,008.90x = 169,673.54 × 77,606.78
  4. Step 4: Simplify right side
    123,008.90x = 13,167,817,090.60
  5. Step 5: Solve for x
    x = 13,167,817,090.60/123,008.90
  6. Step 6: Final answer
    x = 107,047.68

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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.