Home / 85,824,009.20-128,736,013.80-21,127,300.40

Finding the Fourth Proportional to 85,824,009.20, 128,736,013.80 and 21,127,300.40

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Solution

The fourth proportional to 85,824,009.20, 128,736,013.80 and 21,127,300.40 is: 31,690,950.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,009.20 : 128,736,013.80 = 21,127,300.40 : x
  2. Step 2: Convert to fraction form
    85,824,009.20/128,736,013.80 = 21,127,300.40/x
  3. Step 3: Cross multiply
    85,824,009.20x = 128,736,013.80 × 21,127,300.40
  4. Step 4: Simplify right side
    85,824,009.20x = 2,719,844,435,851,145.50
  5. Step 5: Solve for x
    x = 2,719,844,435,851,145.50/85,824,009.20
  6. Step 6: Final answer
    x = 31,690,950.60

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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.