Home / 129,402,429.12-178,598,418.48-76,476,976.20

Finding the Fourth Proportional to 129,402,429.12, 178,598,418.48 and 76,476,976.20

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Solution

The fourth proportional to 129,402,429.12, 178,598,418.48 and 76,476,976.20 is: 105,551,859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,402,429.12 : 178,598,418.48 = 76,476,976.20 : x
  2. Step 2: Convert to fraction form
    129,402,429.12/178,598,418.48 = 76,476,976.20/x
  3. Step 3: Cross multiply
    129,402,429.12x = 178,598,418.48 × 76,476,976.20
  4. Step 4: Simplify right side
    129,402,429.12x = 13,658,666,999,452,600
  5. Step 5: Solve for x
    x = 13,658,666,999,452,600/129,402,429.12
  6. Step 6: Final answer
    x = 105,551,859.36

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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.