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Finding the Fourth Proportional to 72,966.17, 100,683.50 and 42,338.45

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Solution

The fourth proportional to 72,966.17, 100,683.50 and 42,338.45 is: 58,421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,966.17 : 100,683.50 = 42,338.45 : x
  2. Step 2: Convert to fraction form
    72,966.17/100,683.50 = 42,338.45/x
  3. Step 3: Cross multiply
    72,966.17x = 100,683.50 × 42,338.45
  4. Step 4: Simplify right side
    72,966.17x = 4,262,782,615.47
  5. Step 5: Solve for x
    x = 4,262,782,615.47/72,966.17
  6. Step 6: Final answer
    x = 58,421.36

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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.