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Finding the Fourth Proportional to 51,045.50, 70,442.79 and 28,689.50

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Solution

The fourth proportional to 51,045.50, 70,442.79 and 28,689.50 is: 39,591.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,045.50 : 70,442.79 = 28,689.50 : x
  2. Step 2: Convert to fraction form
    51,045.50/70,442.79 = 28,689.50/x
  3. Step 3: Cross multiply
    51,045.50x = 70,442.79 × 28,689.50
  4. Step 4: Simplify right side
    51,045.50x = 2,020,968,423.71
  5. Step 5: Solve for x
    x = 2,020,968,423.71/51,045.50
  6. Step 6: Final answer
    x = 39,591.51

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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.