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Finding the Fourth Proportional to 72,495.81, 100,023.66 and 42,282.45

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Solution

The fourth proportional to 72,495.81, 100,023.66 and 42,282.45 is: 58,337.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,495.81 : 100,023.66 = 42,282.45 : x
  2. Step 2: Convert to fraction form
    72,495.81/100,023.66 = 42,282.45/x
  3. Step 3: Cross multiply
    72,495.81x = 100,023.66 × 42,282.45
  4. Step 4: Simplify right side
    72,495.81x = 4,229,245,402.77
  5. Step 5: Solve for x
    x = 4,229,245,402.77/72,495.81
  6. Step 6: Final answer
    x = 58,337.79

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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.