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Finding the Fourth Proportional to 91,477.20, 137,215.80 and 90,602.40

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Solution

The fourth proportional to 91,477.20, 137,215.80 and 90,602.40 is: 135,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,477.20 : 137,215.80 = 90,602.40 : x
  2. Step 2: Convert to fraction form
    91,477.20/137,215.80 = 90,602.40/x
  3. Step 3: Cross multiply
    91,477.20x = 137,215.80 × 90,602.40
  4. Step 4: Simplify right side
    91,477.20x = 12,432,080,797.92
  5. Step 5: Solve for x
    x = 12,432,080,797.92/91,477.20
  6. Step 6: Final answer
    x = 135,903.60

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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.