Home / 81,946.40-112,848-71,186.36

Finding the Fourth Proportional to 81,946.40, 112,848 and 71,186.36

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Solution

The fourth proportional to 81,946.40, 112,848 and 71,186.36 is: 98,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,946.40 : 112,848 = 71,186.36 : x
  2. Step 2: Convert to fraction form
    81,946.40/112,848 = 71,186.36/x
  3. Step 3: Cross multiply
    81,946.40x = 112,848 × 71,186.36
  4. Step 4: Simplify right side
    81,946.40x = 8,033,238,353.28
  5. Step 5: Solve for x
    x = 8,033,238,353.28/81,946.40
  6. Step 6: Final answer
    x = 98,030.40

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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.