Home / 142,807.12-197,069.16-86,208.64

Finding the Fourth Proportional to 142,807.12, 197,069.16 and 86,208.64

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Solution

The fourth proportional to 142,807.12, 197,069.16 and 86,208.64 is: 118,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,807.12 : 197,069.16 = 86,208.64 : x
  2. Step 2: Convert to fraction form
    142,807.12/197,069.16 = 86,208.64/x
  3. Step 3: Cross multiply
    142,807.12x = 197,069.16 × 86,208.64
  4. Step 4: Simplify right side
    142,807.12x = 16,989,064,269.54
  5. Step 5: Solve for x
    x = 16,989,064,269.54/142,807.12
  6. Step 6: Final answer
    x = 118,965.11

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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.