Home / 154,653.40-213,439.46-86,688.76

Finding the Fourth Proportional to 154,653.40, 213,439.46 and 86,688.76

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Solution

The fourth proportional to 154,653.40, 213,439.46 and 86,688.76 is: 119,640.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,653.40 : 213,439.46 = 86,688.76 : x
  2. Step 2: Convert to fraction form
    154,653.40/213,439.46 = 86,688.76/x
  3. Step 3: Cross multiply
    154,653.40x = 213,439.46 × 86,688.76
  4. Step 4: Simplify right side
    154,653.40x = 18,502,802,122.47
  5. Step 5: Solve for x
    x = 18,502,802,122.47/154,653.40
  6. Step 6: Final answer
    x = 119,640.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.