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Finding the Fourth Proportional to 90,089.88, 135,096.30 and 30,931.53

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Solution

The fourth proportional to 90,089.88, 135,096.30 and 30,931.53 is: 46,384.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,089.88 : 135,096.30 = 30,931.53 : x
  2. Step 2: Convert to fraction form
    90,089.88/135,096.30 = 30,931.53/x
  3. Step 3: Cross multiply
    90,089.88x = 135,096.30 × 30,931.53
  4. Step 4: Simplify right side
    90,089.88x = 4,178,735,256.34
  5. Step 5: Solve for x
    x = 4,178,735,256.34/90,089.88
  6. Step 6: Final answer
    x = 46,384.07

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1.5x scale

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.