Home / 190,931.40-286,310.70-85,696.20

Finding the Fourth Proportional to 190,931.40, 286,310.70 and 85,696.20

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Solution

The fourth proportional to 190,931.40, 286,310.70 and 85,696.20 is: 128,505.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,931.40 : 286,310.70 = 85,696.20 : x
  2. Step 2: Convert to fraction form
    190,931.40/286,310.70 = 85,696.20/x
  3. Step 3: Cross multiply
    190,931.40x = 286,310.70 × 85,696.20
  4. Step 4: Simplify right side
    190,931.40x = 24,535,739,009.34
  5. Step 5: Solve for x
    x = 24,535,739,009.34/190,931.40
  6. Step 6: Final answer
    x = 128,505.52

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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.