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Finding the Fourth Proportional to 91,290.77, 125,978.93 and 51,004.84

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Solution

The fourth proportional to 91,290.77, 125,978.93 and 51,004.84 is: 70,385.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,290.77 : 125,978.93 = 51,004.84 : x
  2. Step 2: Convert to fraction form
    91,290.77/125,978.93 = 51,004.84/x
  3. Step 3: Cross multiply
    91,290.77x = 125,978.93 × 51,004.84
  4. Step 4: Simplify right side
    91,290.77x = 6,425,535,168.02
  5. Step 5: Solve for x
    x = 6,425,535,168.02/91,290.77
  6. Step 6: Final answer
    x = 70,385.38

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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.