Home / 156,890.33-216,510-85,270.36

Finding the Fourth Proportional to 156,890.33, 216,510 and 85,270.36

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Solution

The fourth proportional to 156,890.33, 216,510 and 85,270.36 is: 117,673.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,890.33 : 216,510 = 85,270.36 : x
  2. Step 2: Convert to fraction form
    156,890.33/216,510 = 85,270.36/x
  3. Step 3: Cross multiply
    156,890.33x = 216,510 × 85,270.36
  4. Step 4: Simplify right side
    156,890.33x = 18,461,885,643.60
  5. Step 5: Solve for x
    x = 18,461,885,643.60/156,890.33
  6. Step 6: Final answer
    x = 117,673.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.