Home / 42,642,079.80-63,921,129.30-21,080,009.40

Finding the Fourth Proportional to 42,642,079.80, 63,921,129.30 and 21,080,009.40

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Solution

The fourth proportional to 42,642,079.80, 63,921,129.30 and 21,080,009.40 is: 31,599,256.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,642,079.80 : 63,921,129.30 = 21,080,009.40 : x
  2. Step 2: Convert to fraction form
    42,642,079.80/63,921,129.30 = 21,080,009.40/x
  3. Step 3: Cross multiply
    42,642,079.80x = 63,921,129.30 × 21,080,009.40
  4. Step 4: Simplify right side
    42,642,079.80x = 1,347,458,006,502,615.25
  5. Step 5: Solve for x
    x = 1,347,458,006,502,615.25/42,642,079.80
  6. Step 6: Final answer
    x = 31,599,256.25

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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.