Home / 90,905.40-136,358.10-57,772.35

Finding the Fourth Proportional to 90,905.40, 136,358.10 and 57,772.35

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Solution

The fourth proportional to 90,905.40, 136,358.10 and 57,772.35 is: 86,658.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,905.40 : 136,358.10 = 57,772.35 : x
  2. Step 2: Convert to fraction form
    90,905.40/136,358.10 = 57,772.35/x
  3. Step 3: Cross multiply
    90,905.40x = 136,358.10 × 57,772.35
  4. Step 4: Simplify right side
    90,905.40x = 7,877,727,878.54
  5. Step 5: Solve for x
    x = 7,877,727,878.54/90,905.40
  6. Step 6: Final answer
    x = 86,658.53

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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.