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Finding the Fourth Proportional to 76,415.34, 105,453.54 and 47,751.65

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Solution

The fourth proportional to 76,415.34, 105,453.54 and 47,751.65 is: 65,897.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,415.34 : 105,453.54 = 47,751.65 : x
  2. Step 2: Convert to fraction form
    76,415.34/105,453.54 = 47,751.65/x
  3. Step 3: Cross multiply
    76,415.34x = 105,453.54 × 47,751.65
  4. Step 4: Simplify right side
    76,415.34x = 5,035,580,006.07
  5. Step 5: Solve for x
    x = 5,035,580,006.07/76,415.34
  6. Step 6: Final answer
    x = 65,897.50

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1.5x scale

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.