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Finding the Fourth Proportional to 153,461.79, 211,809.95 and 103,131.63

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Solution

The fourth proportional to 153,461.79, 211,809.95 and 103,131.63 is: 142,343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,461.79 : 211,809.95 = 103,131.63 : x
  2. Step 2: Convert to fraction form
    153,461.79/211,809.95 = 103,131.63/x
  3. Step 3: Cross multiply
    153,461.79x = 211,809.95 × 103,131.63
  4. Step 4: Simplify right side
    153,461.79x = 21,844,305,393.72
  5. Step 5: Solve for x
    x = 21,844,305,393.72/153,461.79
  6. Step 6: Final answer
    x = 142,343.61

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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.