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Finding the Fourth Proportional to 70,570.67, 105,775.47 and 28,423.76

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Solution

The fourth proportional to 70,570.67, 105,775.47 and 28,423.76 is: 42,603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,570.67 : 105,775.47 = 28,423.76 : x
  2. Step 2: Convert to fraction form
    70,570.67/105,775.47 = 28,423.76/x
  3. Step 3: Cross multiply
    70,570.67x = 105,775.47 × 28,423.76
  4. Step 4: Simplify right side
    70,570.67x = 3,006,536,639.28
  5. Step 5: Solve for x
    x = 3,006,536,639.28/70,570.67
  6. Step 6: Final answer
    x = 42,603.21

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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.