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Finding the Fourth Proportional to 91,509.96, 136,655.95 and 90,520.34

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Solution

The fourth proportional to 91,509.96, 136,655.95 and 90,520.34 is: 135,178.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,509.96 : 136,655.95 = 90,520.34 : x
  2. Step 2: Convert to fraction form
    91,509.96/136,655.95 = 90,520.34/x
  3. Step 3: Cross multiply
    91,509.96x = 136,655.95 × 90,520.34
  4. Step 4: Simplify right side
    91,509.96x = 12,370,143,172.36
  5. Step 5: Solve for x
    x = 12,370,143,172.36/91,509.96
  6. Step 6: Final answer
    x = 135,178.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.