Home / 78,345,752.80-117,518,629.20-42,066,047.20

Finding the Fourth Proportional to 78,345,752.80, 117,518,629.20 and 42,066,047.20

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Solution

The fourth proportional to 78,345,752.80, 117,518,629.20 and 42,066,047.20 is: 63,099,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,345,752.80 : 117,518,629.20 = 42,066,047.20 : x
  2. Step 2: Convert to fraction form
    78,345,752.80/117,518,629.20 = 42,066,047.20/x
  3. Step 3: Cross multiply
    78,345,752.80x = 117,518,629.20 × 42,066,047.20
  4. Step 4: Simplify right side
    78,345,752.80x = 4,943,544,202,806,499
  5. Step 5: Solve for x
    x = 4,943,544,202,806,499/78,345,752.80
  6. Step 6: Final answer
    x = 63,099,070.80

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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.