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Finding the Fourth Proportional to 56,139.51, 77,472.54 and 30,989.01

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Solution

The fourth proportional to 56,139.51, 77,472.54 and 30,989.01 is: 42,764.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,139.51 : 77,472.54 = 30,989.01 : x
  2. Step 2: Convert to fraction form
    56,139.51/77,472.54 = 30,989.01/x
  3. Step 3: Cross multiply
    56,139.51x = 77,472.54 × 30,989.01
  4. Step 4: Simplify right side
    56,139.51x = 2,400,797,316.79
  5. Step 5: Solve for x
    x = 2,400,797,316.79/56,139.51
  6. Step 6: Final answer
    x = 42,764.84

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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.