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Finding the Fourth Proportional to 91,006.60, 136,509.90 and 89,840.20

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Solution

The fourth proportional to 91,006.60, 136,509.90 and 89,840.20 is: 134,760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,006.60 : 136,509.90 = 89,840.20 : x
  2. Step 2: Convert to fraction form
    91,006.60/136,509.90 = 89,840.20/x
  3. Step 3: Cross multiply
    91,006.60x = 136,509.90 × 89,840.20
  4. Step 4: Simplify right side
    91,006.60x = 12,264,076,717.98
  5. Step 5: Solve for x
    x = 12,264,076,717.98/91,006.60
  6. Step 6: Final answer
    x = 134,760.30

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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.