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Finding the Fourth Proportional to 70,979.76, 97,957.08 and 40,770

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Solution

The fourth proportional to 70,979.76, 97,957.08 and 40,770 is: 56,265.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,979.76 : 97,957.08 = 40,770 : x
  2. Step 2: Convert to fraction form
    70,979.76/97,957.08 = 40,770/x
  3. Step 3: Cross multiply
    70,979.76x = 97,957.08 × 40,770
  4. Step 4: Simplify right side
    70,979.76x = 3,993,710,151.60
  5. Step 5: Solve for x
    x = 3,993,710,151.60/70,979.76
  6. Step 6: Final answer
    x = 56,265.48

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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.