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Finding the Fourth Proportional to 70,390.51, 97,111.85 and 40,177.51

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Solution

The fourth proportional to 70,390.51, 97,111.85 and 40,177.51 is: 55,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390.51 : 97,111.85 = 40,177.51 : x
  2. Step 2: Convert to fraction form
    70,390.51/97,111.85 = 40,177.51/x
  3. Step 3: Cross multiply
    70,390.51x = 97,111.85 × 40,177.51
  4. Step 4: Simplify right side
    70,390.51x = 3,901,711,880.83
  5. Step 5: Solve for x
    x = 3,901,711,880.83/70,390.51
  6. Step 6: Final answer
    x = 55,429.52

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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.