Home / 56,631.36-78,156-31,483.20

Finding the Fourth Proportional to 56,631.36, 78,156 and 31,483.20

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Solution

The fourth proportional to 56,631.36, 78,156 and 31,483.20 is: 43,449.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,631.36 : 78,156 = 31,483.20 : x
  2. Step 2: Convert to fraction form
    56,631.36/78,156 = 31,483.20/x
  3. Step 3: Cross multiply
    56,631.36x = 78,156 × 31,483.20
  4. Step 4: Simplify right side
    56,631.36x = 2,460,600,979.20
  5. Step 5: Solve for x
    x = 2,460,600,979.20/56,631.36
  6. Step 6: Final answer
    x = 43,449.44

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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.