Home / 78,881,570.40-118,322,355.60-66,788,335.20

Finding the Fourth Proportional to 78,881,570.40, 118,322,355.60 and 66,788,335.20

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Solution

The fourth proportional to 78,881,570.40, 118,322,355.60 and 66,788,335.20 is: 100,182,502.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,881,570.40 : 118,322,355.60 = 66,788,335.20 : x
  2. Step 2: Convert to fraction form
    78,881,570.40/118,322,355.60 = 66,788,335.20/x
  3. Step 3: Cross multiply
    78,881,570.40x = 118,322,355.60 × 66,788,335.20
  4. Step 4: Simplify right side
    78,881,570.40x = 7,902,553,147,466,397
  5. Step 5: Solve for x
    x = 7,902,553,147,466,397/78,881,570.40
  6. Step 6: Final answer
    x = 100,182,502.80

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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.