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Finding the Fourth Proportional to 101,390.80, 139,913.64 and 56,066.04

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Solution

The fourth proportional to 101,390.80, 139,913.64 and 56,066.04 is: 77,368.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,390.80 : 139,913.64 = 56,066.04 : x
  2. Step 2: Convert to fraction form
    101,390.80/139,913.64 = 56,066.04/x
  3. Step 3: Cross multiply
    101,390.80x = 139,913.64 × 56,066.04
  4. Step 4: Simplify right side
    101,390.80x = 7,844,403,736.79
  5. Step 5: Solve for x
    x = 7,844,403,736.79/101,390.80
  6. Step 6: Final answer
    x = 77,368.00

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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.