Home / 78,880,678.43-118,859,435.73-64,818,749.57

Finding the Fourth Proportional to 78,880,678.43, 118,859,435.73 and 64,818,749.57

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Solution

The fourth proportional to 78,880,678.43, 118,859,435.73 and 64,818,749.57 is: 97,670,559.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880,678.43 : 118,859,435.73 = 64,818,749.57 : x
  2. Step 2: Convert to fraction form
    78,880,678.43/118,859,435.73 = 64,818,749.57/x
  3. Step 3: Cross multiply
    78,880,678.43x = 118,859,435.73 × 64,818,749.57
  4. Step 4: Simplify right side
    78,880,678.43x = 7,704,319,998,020,083
  5. Step 5: Solve for x
    x = 7,704,319,998,020,083/78,880,678.43
  6. Step 6: Final answer
    x = 97,670,559.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.