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Finding the Fourth Proportional to 89,130.60, 133,695.90 and 76,008.60

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Solution

The fourth proportional to 89,130.60, 133,695.90 and 76,008.60 is: 114,012.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,130.60 : 133,695.90 = 76,008.60 : x
  2. Step 2: Convert to fraction form
    89,130.60/133,695.90 = 76,008.60/x
  3. Step 3: Cross multiply
    89,130.60x = 133,695.90 × 76,008.60
  4. Step 4: Simplify right side
    89,130.60x = 10,162,038,184.74
  5. Step 5: Solve for x
    x = 10,162,038,184.74/89,130.60
  6. Step 6: Final answer
    x = 114,012.90

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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.