Home / 78,938.69-118,872.62-56,907.10

Finding the Fourth Proportional to 78,938.69, 118,872.62 and 56,907.10

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Solution

The fourth proportional to 78,938.69, 118,872.62 and 56,907.10 is: 85,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.69 : 118,872.62 = 56,907.10 : x
  2. Step 2: Convert to fraction form
    78,938.69/118,872.62 = 56,907.10/x
  3. Step 3: Cross multiply
    78,938.69x = 118,872.62 × 56,907.10
  4. Step 4: Simplify right side
    78,938.69x = 6,764,695,479.24
  5. Step 5: Solve for x
    x = 6,764,695,479.24/78,938.69
  6. Step 6: Final answer
    x = 85,695.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.