Home / 86,019.60-128,904.36-37,929.72

Finding the Fourth Proportional to 86,019.60, 128,904.36 and 37,929.72

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Solution

The fourth proportional to 86,019.60, 128,904.36 and 37,929.72 is: 56,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,019.60 : 128,904.36 = 37,929.72 : x
  2. Step 2: Convert to fraction form
    86,019.60/128,904.36 = 37,929.72/x
  3. Step 3: Cross multiply
    86,019.60x = 128,904.36 × 37,929.72
  4. Step 4: Simplify right side
    86,019.60x = 4,889,306,281.58
  5. Step 5: Solve for x
    x = 4,889,306,281.58/86,019.60
  6. Step 6: Final answer
    x = 56,839.44

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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.