Home / 85,756,994.32-128,643,889.56-28,225,791.76

Finding the Fourth Proportional to 85,756,994.32, 128,643,889.56 and 28,225,791.76

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Solution

The fourth proportional to 85,756,994.32, 128,643,889.56 and 28,225,791.76 is: 42,341,451.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,756,994.32 : 128,643,889.56 = 28,225,791.76 : x
  2. Step 2: Convert to fraction form
    85,756,994.32/128,643,889.56 = 28,225,791.76/x
  3. Step 3: Cross multiply
    85,756,994.32x = 128,643,889.56 × 28,225,791.76
  4. Step 4: Simplify right side
    85,756,994.32x = 3,631,075,637,916,998.50
  5. Step 5: Solve for x
    x = 3,631,075,637,916,998.50/85,756,994.32
  6. Step 6: Final answer
    x = 42,341,451.76

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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.