Home / 142,085.16-196,069.14-78,421.32

Finding the Fourth Proportional to 142,085.16, 196,069.14 and 78,421.32

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Solution

The fourth proportional to 142,085.16, 196,069.14 and 78,421.32 is: 108,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,085.16 : 196,069.14 = 78,421.32 : x
  2. Step 2: Convert to fraction form
    142,085.16/196,069.14 = 78,421.32/x
  3. Step 3: Cross multiply
    142,085.16x = 196,069.14 × 78,421.32
  4. Step 4: Simplify right side
    142,085.16x = 15,376,000,770.06
  5. Step 5: Solve for x
    x = 15,376,000,770.06/142,085.16
  6. Step 6: Final answer
    x = 108,216.80

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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.