Home / 85,461.48-128,094.47-53,455.09

Finding the Fourth Proportional to 85,461.48, 128,094.47 and 53,455.09

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Solution

The fourth proportional to 85,461.48, 128,094.47 and 53,455.09 is: 80,121.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,461.48 : 128,094.47 = 53,455.09 : x
  2. Step 2: Convert to fraction form
    85,461.48/128,094.47 = 53,455.09/x
  3. Step 3: Cross multiply
    85,461.48x = 128,094.47 × 53,455.09
  4. Step 4: Simplify right side
    85,461.48x = 6,847,301,422.35
  5. Step 5: Solve for x
    x = 6,847,301,422.35/85,461.48
  6. Step 6: Final answer
    x = 80,121.49

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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.