Home / 142,840.81-197,116.04-78,307.84

Finding the Fourth Proportional to 142,840.81, 197,116.04 and 78,307.84

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Solution

The fourth proportional to 142,840.81, 197,116.04 and 78,307.84 is: 108,062.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,840.81 : 197,116.04 = 78,307.84 : x
  2. Step 2: Convert to fraction form
    142,840.81/197,116.04 = 78,307.84/x
  3. Step 3: Cross multiply
    142,840.81x = 197,116.04 × 78,307.84
  4. Step 4: Simplify right side
    142,840.81x = 15,435,730,336.17
  5. Step 5: Solve for x
    x = 15,435,730,336.17/142,840.81
  6. Step 6: Final answer
    x = 108,062.47

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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.