Home / 77,128,980.51-115,694,148.74-19,621,312.50

Finding the Fourth Proportional to 77,128,980.51, 115,694,148.74 and 19,621,312.50

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Solution

The fourth proportional to 77,128,980.51, 115,694,148.74 and 19,621,312.50 is: 29,432,141.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128,980.51 : 115,694,148.74 = 19,621,312.50 : x
  2. Step 2: Convert to fraction form
    77,128,980.51/115,694,148.74 = 19,621,312.50/x
  3. Step 3: Cross multiply
    77,128,980.51x = 115,694,148.74 × 19,621,312.50
  4. Step 4: Simplify right side
    77,128,980.51x = 2,270,071,046,750,914.50
  5. Step 5: Solve for x
    x = 2,270,071,046,750,914.50/77,128,980.51
  6. Step 6: Final answer
    x = 29,432,141.22

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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.