Home / 105,255.08-145,250.31-57,507.40

Finding the Fourth Proportional to 105,255.08, 145,250.31 and 57,507.40

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Solution

The fourth proportional to 105,255.08, 145,250.31 and 57,507.40 is: 79,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,255.08 : 145,250.31 = 57,507.40 : x
  2. Step 2: Convert to fraction form
    105,255.08/145,250.31 = 57,507.40/x
  3. Step 3: Cross multiply
    105,255.08x = 145,250.31 × 57,507.40
  4. Step 4: Simplify right side
    105,255.08x = 8,352,968,074.51
  5. Step 5: Solve for x
    x = 8,352,968,074.51/105,255.08
  6. Step 6: Final answer
    x = 79,359.29

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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.