Home / 85,824,334.20-128,736,501.30-21,127,625.40

Finding the Fourth Proportional to 85,824,334.20, 128,736,501.30 and 21,127,625.40

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Solution

The fourth proportional to 85,824,334.20, 128,736,501.30 and 21,127,625.40 is: 31,691,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,334.20 : 128,736,501.30 = 21,127,625.40 : x
  2. Step 2: Convert to fraction form
    85,824,334.20/128,736,501.30 = 21,127,625.40/x
  3. Step 3: Cross multiply
    85,824,334.20x = 128,736,501.30 × 21,127,625.40
  4. Step 4: Simplify right side
    85,824,334.20x = 2,719,896,574,773,013
  5. Step 5: Solve for x
    x = 2,719,896,574,773,013/85,824,334.20
  6. Step 6: Final answer
    x = 31,691,438.10

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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.