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Finding the Fourth Proportional to 90,904.42, 125,405.03 and 59,061.70

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Solution

The fourth proportional to 90,904.42, 125,405.03 and 59,061.70 is: 81,477.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,904.42 : 125,405.03 = 59,061.70 : x
  2. Step 2: Convert to fraction form
    90,904.42/125,405.03 = 59,061.70/x
  3. Step 3: Cross multiply
    90,904.42x = 125,405.03 × 59,061.70
  4. Step 4: Simplify right side
    90,904.42x = 7,406,633,338.02
  5. Step 5: Solve for x
    x = 7,406,633,338.02/90,904.42
  6. Step 6: Final answer
    x = 81,477.16

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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.