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Finding the Fourth Proportional to 139,053.04, 191,892.36 and 75,390.64

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Solution

The fourth proportional to 139,053.04, 191,892.36 and 75,390.64 is: 104,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,053.04 : 191,892.36 = 75,390.64 : x
  2. Step 2: Convert to fraction form
    139,053.04/191,892.36 = 75,390.64/x
  3. Step 3: Cross multiply
    139,053.04x = 191,892.36 × 75,390.64
  4. Step 4: Simplify right side
    139,053.04x = 14,466,887,831.51
  5. Step 5: Solve for x
    x = 14,466,887,831.51/139,053.04
  6. Step 6: Final answer
    x = 104,038.63

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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.