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Finding the Fourth Proportional to 101,080.80, 139,488.48 and 56,368.80

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Solution

The fourth proportional to 101,080.80, 139,488.48 and 56,368.80 is: 77,787.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,080.80 : 139,488.48 = 56,368.80 : x
  2. Step 2: Convert to fraction form
    101,080.80/139,488.48 = 56,368.80/x
  3. Step 3: Cross multiply
    101,080.80x = 139,488.48 × 56,368.80
  4. Step 4: Simplify right side
    101,080.80x = 7,862,798,231.42
  5. Step 5: Solve for x
    x = 7,862,798,231.42/101,080.80
  6. Step 6: Final answer
    x = 77,787.26

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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.