Home / 78,528.38-108,370.92-42,720.32

Finding the Fourth Proportional to 78,528.38, 108,370.92 and 42,720.32

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Solution

The fourth proportional to 78,528.38, 108,370.92 and 42,720.32 is: 58,955.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528.38 : 108,370.92 = 42,720.32 : x
  2. Step 2: Convert to fraction form
    78,528.38/108,370.92 = 42,720.32/x
  3. Step 3: Cross multiply
    78,528.38x = 108,370.92 × 42,720.32
  4. Step 4: Simplify right side
    78,528.38x = 4,629,640,381.09
  5. Step 5: Solve for x
    x = 4,629,640,381.09/78,528.38
  6. Step 6: Final answer
    x = 58,955.00

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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.