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Finding the Fourth Proportional to 139,987.77, 210,011.42 and 45,223.39

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Solution

The fourth proportional to 139,987.77, 210,011.42 and 45,223.39 is: 67,844.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,987.77 : 210,011.42 = 45,223.39 : x
  2. Step 2: Convert to fraction form
    139,987.77/210,011.42 = 45,223.39/x
  3. Step 3: Cross multiply
    139,987.77x = 210,011.42 × 45,223.39
  4. Step 4: Simplify right side
    139,987.77x = 9,497,428,726.69
  5. Step 5: Solve for x
    x = 9,497,428,726.69/139,987.77
  6. Step 6: Final answer
    x = 67,844.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.