Home / 105,239.91-145,188.07-77,710.53

Finding the Fourth Proportional to 105,239.91, 145,188.07 and 77,710.53

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Solution

The fourth proportional to 105,239.91, 145,188.07 and 77,710.53 is: 107,208.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,239.91 : 145,188.07 = 77,710.53 : x
  2. Step 2: Convert to fraction form
    105,239.91/145,188.07 = 77,710.53/x
  3. Step 3: Cross multiply
    105,239.91x = 145,188.07 × 77,710.53
  4. Step 4: Simplify right side
    105,239.91x = 11,282,641,675.10
  5. Step 5: Solve for x
    x = 11,282,641,675.10/105,239.91
  6. Step 6: Final answer
    x = 107,208.77

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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.