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Finding the Fourth Proportional to 79,646.40, 119,534.40 and 77,054.40

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Solution

The fourth proportional to 79,646.40, 119,534.40 and 77,054.40 is: 115,644.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,646.40 : 119,534.40 = 77,054.40 : x
  2. Step 2: Convert to fraction form
    79,646.40/119,534.40 = 77,054.40/x
  3. Step 3: Cross multiply
    79,646.40x = 119,534.40 × 77,054.40
  4. Step 4: Simplify right side
    79,646.40x = 9,210,651,471.36
  5. Step 5: Solve for x
    x = 9,210,651,471.36/79,646.40
  6. Step 6: Final answer
    x = 115,644.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.