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Finding the Fourth Proportional to 134,901.65, 186,177.53 and 78,309.65

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Solution

The fourth proportional to 134,901.65, 186,177.53 and 78,309.65 is: 108,075.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,901.65 : 186,177.53 = 78,309.65 : x
  2. Step 2: Convert to fraction form
    134,901.65/186,177.53 = 78,309.65/x
  3. Step 3: Cross multiply
    134,901.65x = 186,177.53 × 78,309.65
  4. Step 4: Simplify right side
    134,901.65x = 14,579,497,212.16
  5. Step 5: Solve for x
    x = 14,579,497,212.16/134,901.65
  6. Step 6: Final answer
    x = 108,075.01

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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.