Home / 78,732,138.40-118,098,207.60-64,371,421.60

Finding the Fourth Proportional to 78,732,138.40, 118,098,207.60 and 64,371,421.60

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Solution

The fourth proportional to 78,732,138.40, 118,098,207.60 and 64,371,421.60 is: 96,557,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,138.40 : 118,098,207.60 = 64,371,421.60 : x
  2. Step 2: Convert to fraction form
    78,732,138.40/118,098,207.60 = 64,371,421.60/x
  3. Step 3: Cross multiply
    78,732,138.40x = 118,098,207.60 × 64,371,421.60
  4. Step 4: Simplify right side
    78,732,138.40x = 7,602,149,511,623,924
  5. Step 5: Solve for x
    x = 7,602,149,511,623,924/78,732,138.40
  6. Step 6: Final answer
    x = 96,557,132.40

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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.