Home / 78,959,881.60-118,439,822.40-61,021,859.20

Finding the Fourth Proportional to 78,959,881.60, 118,439,822.40 and 61,021,859.20

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Solution

The fourth proportional to 78,959,881.60, 118,439,822.40 and 61,021,859.20 is: 91,532,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959,881.60 : 118,439,822.40 = 61,021,859.20 : x
  2. Step 2: Convert to fraction form
    78,959,881.60/118,439,822.40 = 61,021,859.20/x
  3. Step 3: Cross multiply
    78,959,881.60x = 118,439,822.40 × 61,021,859.20
  4. Step 4: Simplify right side
    78,959,881.60x = 7,227,418,166,165,807
  5. Step 5: Solve for x
    x = 7,227,418,166,165,807/78,959,881.60
  6. Step 6: Final answer
    x = 91,532,788.80

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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.