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Finding the Fourth Proportional to 84,935.80, 127,403.70 and 65,313.40

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Solution

The fourth proportional to 84,935.80, 127,403.70 and 65,313.40 is: 97,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,935.80 : 127,403.70 = 65,313.40 : x
  2. Step 2: Convert to fraction form
    84,935.80/127,403.70 = 65,313.40/x
  3. Step 3: Cross multiply
    84,935.80x = 127,403.70 × 65,313.40
  4. Step 4: Simplify right side
    84,935.80x = 8,321,168,819.58
  5. Step 5: Solve for x
    x = 8,321,168,819.58/84,935.80
  6. Step 6: Final answer
    x = 97,970.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.