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Finding the Fourth Proportional to 127,130, 175,471.64 and 86,860.04

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Solution

The fourth proportional to 127,130, 175,471.64 and 86,860.04 is: 119,888.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,130 : 175,471.64 = 86,860.04 : x
  2. Step 2: Convert to fraction form
    127,130/175,471.64 = 86,860.04/x
  3. Step 3: Cross multiply
    127,130x = 175,471.64 × 86,860.04
  4. Step 4: Simplify right side
    127,130x = 15,241,473,669.27
  5. Step 5: Solve for x
    x = 15,241,473,669.27/127,130
  6. Step 6: Final answer
    x = 119,888.88

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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.