Home / 85,459.02-128,178.45-53,775.60

Finding the Fourth Proportional to 85,459.02, 128,178.45 and 53,775.60

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Solution

The fourth proportional to 85,459.02, 128,178.45 and 53,775.60 is: 80,657.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,459.02 : 128,178.45 = 53,775.60 : x
  2. Step 2: Convert to fraction form
    85,459.02/128,178.45 = 53,775.60/x
  3. Step 3: Cross multiply
    85,459.02x = 128,178.45 × 53,775.60
  4. Step 4: Simplify right side
    85,459.02x = 6,892,873,055.82
  5. Step 5: Solve for x
    x = 6,892,873,055.82/85,459.02
  6. Step 6: Final answer
    x = 80,657.06

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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.