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Finding the Fourth Proportional to 91,145.60, 136,737.60 and 28,822.40

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Solution

The fourth proportional to 91,145.60, 136,737.60 and 28,822.40 is: 43,239.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,145.60 : 136,737.60 = 28,822.40 : x
  2. Step 2: Convert to fraction form
    91,145.60/136,737.60 = 28,822.40/x
  3. Step 3: Cross multiply
    91,145.60x = 136,737.60 × 28,822.40
  4. Step 4: Simplify right side
    91,145.60x = 3,941,105,802.24
  5. Step 5: Solve for x
    x = 3,941,105,802.24/91,145.60
  6. Step 6: Final answer
    x = 43,239.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.