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Finding the Fourth Proportional to 77,617.76, 107,124.10 and 47,420.52

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Solution

The fourth proportional to 77,617.76, 107,124.10 and 47,420.52 is: 65,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,617.76 : 107,124.10 = 47,420.52 : x
  2. Step 2: Convert to fraction form
    77,617.76/107,124.10 = 47,420.52/x
  3. Step 3: Cross multiply
    77,617.76x = 107,124.10 × 47,420.52
  4. Step 4: Simplify right side
    77,617.76x = 5,079,880,526.53
  5. Step 5: Solve for x
    x = 5,079,880,526.53/77,617.76
  6. Step 6: Final answer
    x = 65,447.40

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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.