Home / 78,732,021.60-118,098,032.40-72,992,458.80

Finding the Fourth Proportional to 78,732,021.60, 118,098,032.40 and 72,992,458.80

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Solution

The fourth proportional to 78,732,021.60, 118,098,032.40 and 72,992,458.80 is: 109,488,688.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,021.60 : 118,098,032.40 = 72,992,458.80 : x
  2. Step 2: Convert to fraction form
    78,732,021.60/118,098,032.40 = 72,992,458.80/x
  3. Step 3: Cross multiply
    78,732,021.60x = 118,098,032.40 × 72,992,458.80
  4. Step 4: Simplify right side
    78,732,021.60x = 8,620,265,764,318,065
  5. Step 5: Solve for x
    x = 8,620,265,764,318,065/78,732,021.60
  6. Step 6: Final answer
    x = 109,488,688.20

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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.