Home / 78,723,809.40-118,085,714.10-21,215,969.40

Finding the Fourth Proportional to 78,723,809.40, 118,085,714.10 and 21,215,969.40

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Solution

The fourth proportional to 78,723,809.40, 118,085,714.10 and 21,215,969.40 is: 31,823,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723,809.40 : 118,085,714.10 = 21,215,969.40 : x
  2. Step 2: Convert to fraction form
    78,723,809.40/118,085,714.10 = 21,215,969.40/x
  3. Step 3: Cross multiply
    78,723,809.40x = 118,085,714.10 × 21,215,969.40
  4. Step 4: Simplify right side
    78,723,809.40x = 2,505,302,896,922,748
  5. Step 5: Solve for x
    x = 2,505,302,896,922,748/78,723,809.40
  6. Step 6: Final answer
    x = 31,823,954.10

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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.