Home / 85,275.05-128,023.81-57,320.33

Finding the Fourth Proportional to 85,275.05, 128,023.81 and 57,320.33

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Solution

The fourth proportional to 85,275.05, 128,023.81 and 57,320.33 is: 86,055.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,275.05 : 128,023.81 = 57,320.33 : x
  2. Step 2: Convert to fraction form
    85,275.05/128,023.81 = 57,320.33/x
  3. Step 3: Cross multiply
    85,275.05x = 128,023.81 × 57,320.33
  4. Step 4: Simplify right side
    85,275.05x = 7,338,366,253.64
  5. Step 5: Solve for x
    x = 7,338,366,253.64/85,275.05
  6. Step 6: Final answer
    x = 86,055.26

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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.