Home / 78,759,833.80-118,139,750.70-21,252,012.70

Finding the Fourth Proportional to 78,759,833.80, 118,139,750.70 and 21,252,012.70

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Solution

The fourth proportional to 78,759,833.80, 118,139,750.70 and 21,252,012.70 is: 31,878,019.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,759,833.80 : 118,139,750.70 = 21,252,012.70 : x
  2. Step 2: Convert to fraction form
    78,759,833.80/118,139,750.70 = 21,252,012.70/x
  3. Step 3: Cross multiply
    78,759,833.80x = 118,139,750.70 × 21,252,012.70
  4. Step 4: Simplify right side
    78,759,833.80x = 2,510,707,482,251,234
  5. Step 5: Solve for x
    x = 2,510,707,482,251,234/78,759,833.80
  6. Step 6: Final answer
    x = 31,878,019.05

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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.