Home / 78,759,849.40-118,139,774.10-21,252,028.30

Finding the Fourth Proportional to 78,759,849.40, 118,139,774.10 and 21,252,028.30

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Solution

The fourth proportional to 78,759,849.40, 118,139,774.10 and 21,252,028.30 is: 31,878,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,759,849.40 : 118,139,774.10 = 21,252,028.30 : x
  2. Step 2: Convert to fraction form
    78,759,849.40/118,139,774.10 = 21,252,028.30/x
  3. Step 3: Cross multiply
    78,759,849.40x = 118,139,774.10 × 21,252,028.30
  4. Step 4: Simplify right side
    78,759,849.40x = 2,510,709,822,528,807
  5. Step 5: Solve for x
    x = 2,510,709,822,528,807/78,759,849.40
  6. Step 6: Final answer
    x = 31,878,042.45

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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.