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Finding the Fourth Proportional to 38,798,602.80, 53,543,364.03 and 21,158,470.32

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Solution

The fourth proportional to 38,798,602.80, 53,543,364.03 and 21,158,470.32 is: 29,199,393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,798,602.80 : 53,543,364.03 = 21,158,470.32 : x
  2. Step 2: Convert to fraction form
    38,798,602.80/53,543,364.03 = 21,158,470.32/x
  3. Step 3: Cross multiply
    38,798,602.80x = 53,543,364.03 × 21,158,470.32
  4. Step 4: Simplify right side
    38,798,602.80x = 1,132,895,678,661,710.75
  5. Step 5: Solve for x
    x = 1,132,895,678,661,710.75/38,798,602.80
  6. Step 6: Final answer
    x = 29,199,393.71

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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.