Home / 78,319.16-108,080.57-42,509.19

Finding the Fourth Proportional to 78,319.16, 108,080.57 and 42,509.19

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Solution

The fourth proportional to 78,319.16, 108,080.57 and 42,509.19 is: 58,662.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.16 : 108,080.57 = 42,509.19 : x
  2. Step 2: Convert to fraction form
    78,319.16/108,080.57 = 42,509.19/x
  3. Step 3: Cross multiply
    78,319.16x = 108,080.57 × 42,509.19
  4. Step 4: Simplify right side
    78,319.16x = 4,594,417,272.89
  5. Step 5: Solve for x
    x = 4,594,417,272.89/78,319.16
  6. Step 6: Final answer
    x = 58,662.75

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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.