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Finding the Fourth Proportional to 60,420.70, 90,521.70 and 51,672.70

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Solution

The fourth proportional to 60,420.70, 90,521.70 and 51,672.70 is: 77,415.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,420.70 : 90,521.70 = 51,672.70 : x
  2. Step 2: Convert to fraction form
    60,420.70/90,521.70 = 51,672.70/x
  3. Step 3: Cross multiply
    60,420.70x = 90,521.70 × 51,672.70
  4. Step 4: Simplify right side
    60,420.70x = 4,677,500,647.59
  5. Step 5: Solve for x
    x = 4,677,500,647.59/60,420.70
  6. Step 6: Final answer
    x = 77,415.53

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1.5x scale

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.