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Finding the Fourth Proportional to 134,901.90, 186,177.87 and 78,309.90

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Solution

The fourth proportional to 134,901.90, 186,177.87 and 78,309.90 is: 108,075.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,901.90 : 186,177.87 = 78,309.90 : x
  2. Step 2: Convert to fraction form
    134,901.90/186,177.87 = 78,309.90/x
  3. Step 3: Cross multiply
    134,901.90x = 186,177.87 × 78,309.90
  4. Step 4: Simplify right side
    134,901.90x = 14,579,570,381.91
  5. Step 5: Solve for x
    x = 14,579,570,381.91/134,901.90
  6. Step 6: Final answer
    x = 108,075.35

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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.