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Finding the Fourth Proportional to 77,880.56, 107,475.08 and 42,070.56

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Solution

The fourth proportional to 77,880.56, 107,475.08 and 42,070.56 is: 58,057.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,880.56 : 107,475.08 = 42,070.56 : x
  2. Step 2: Convert to fraction form
    77,880.56/107,475.08 = 42,070.56/x
  3. Step 3: Cross multiply
    77,880.56x = 107,475.08 × 42,070.56
  4. Step 4: Simplify right side
    77,880.56x = 4,521,536,591.29
  5. Step 5: Solve for x
    x = 4,521,536,591.29/77,880.56
  6. Step 6: Final answer
    x = 58,057.32

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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.