Home / 56,979.12-78,632.64-31,830.24

Finding the Fourth Proportional to 56,979.12, 78,632.64 and 31,830.24

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Solution

The fourth proportional to 56,979.12, 78,632.64 and 31,830.24 is: 43,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,979.12 : 78,632.64 = 31,830.24 : x
  2. Step 2: Convert to fraction form
    56,979.12/78,632.64 = 31,830.24/x
  3. Step 3: Cross multiply
    56,979.12x = 78,632.64 × 31,830.24
  4. Step 4: Simplify right side
    56,979.12x = 2,502,895,803.03
  5. Step 5: Solve for x
    x = 2,502,895,803.03/56,979.12
  6. Step 6: Final answer
    x = 43,926.54

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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.