Home / 100,837.72-139,154.70-56,125.72

Finding the Fourth Proportional to 100,837.72, 139,154.70 and 56,125.72

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Solution

The fourth proportional to 100,837.72, 139,154.70 and 56,125.72 is: 77,452.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,837.72 : 139,154.70 = 56,125.72 : x
  2. Step 2: Convert to fraction form
    100,837.72/139,154.70 = 56,125.72/x
  3. Step 3: Cross multiply
    100,837.72x = 139,154.70 × 56,125.72
  4. Step 4: Simplify right side
    100,837.72x = 7,810,157,728.88
  5. Step 5: Solve for x
    x = 7,810,157,728.88/100,837.72
  6. Step 6: Final answer
    x = 77,452.74

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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.