Home / 56,612.08-78,123.80-31,117.90

Finding the Fourth Proportional to 56,612.08, 78,123.80 and 31,117.90

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Solution

The fourth proportional to 56,612.08, 78,123.80 and 31,117.90 is: 42,942.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,612.08 : 78,123.80 = 31,117.90 : x
  2. Step 2: Convert to fraction form
    56,612.08/78,123.80 = 31,117.90/x
  3. Step 3: Cross multiply
    56,612.08x = 78,123.80 × 31,117.90
  4. Step 4: Simplify right side
    56,612.08x = 2,431,048,245.12
  5. Step 5: Solve for x
    x = 2,431,048,245.12/56,612.08
  6. Step 6: Final answer
    x = 42,942.22

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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.