Home / 105,533.48-145,629.78-57,787.40

Finding the Fourth Proportional to 105,533.48, 145,629.78 and 57,787.40

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Solution

The fourth proportional to 105,533.48, 145,629.78 and 57,787.40 is: 79,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,533.48 : 145,629.78 = 57,787.40 : x
  2. Step 2: Convert to fraction form
    105,533.48/145,629.78 = 57,787.40/x
  3. Step 3: Cross multiply
    105,533.48x = 145,629.78 × 57,787.40
  4. Step 4: Simplify right side
    105,533.48x = 8,415,566,348.77
  5. Step 5: Solve for x
    x = 8,415,566,348.77/105,533.48
  6. Step 6: Final answer
    x = 79,743.10

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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.