Home / 70,515.13-105,039.80-66,695.32

Finding the Fourth Proportional to 70,515.13, 105,039.80 and 66,695.32

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Solution

The fourth proportional to 70,515.13, 105,039.80 and 66,695.32 is: 99,349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,515.13 : 105,039.80 = 66,695.32 : x
  2. Step 2: Convert to fraction form
    70,515.13/105,039.80 = 66,695.32/x
  3. Step 3: Cross multiply
    70,515.13x = 105,039.80 × 66,695.32
  4. Step 4: Simplify right side
    70,515.13x = 7,005,663,073.74
  5. Step 5: Solve for x
    x = 7,005,663,073.74/70,515.13
  6. Step 6: Final answer
    x = 99,349.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.