Home / 85,824,294.90-128,736,442.35-76,418,445.30

Finding the Fourth Proportional to 85,824,294.90, 128,736,442.35 and 76,418,445.30

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Solution

The fourth proportional to 85,824,294.90, 128,736,442.35 and 76,418,445.30 is: 114,627,667.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,294.90 : 128,736,442.35 = 76,418,445.30 : x
  2. Step 2: Convert to fraction form
    85,824,294.90/128,736,442.35 = 76,418,445.30/x
  3. Step 3: Cross multiply
    85,824,294.90x = 128,736,442.35 × 76,418,445.30
  4. Step 4: Simplify right side
    85,824,294.90x = 9,837,838,777,840,078
  5. Step 5: Solve for x
    x = 9,837,838,777,840,078/85,824,294.90
  6. Step 6: Final answer
    x = 114,627,667.95

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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.