Home / 91,085.40-136,628.10-66,007.80

Finding the Fourth Proportional to 91,085.40, 136,628.10 and 66,007.80

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Solution

The fourth proportional to 91,085.40, 136,628.10 and 66,007.80 is: 99,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,085.40 : 136,628.10 = 66,007.80 : x
  2. Step 2: Convert to fraction form
    91,085.40/136,628.10 = 66,007.80/x
  3. Step 3: Cross multiply
    91,085.40x = 136,628.10 × 66,007.80
  4. Step 4: Simplify right side
    91,085.40x = 9,018,520,299.18
  5. Step 5: Solve for x
    x = 9,018,520,299.18/91,085.40
  6. Step 6: Final answer
    x = 99,011.70

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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.