Home / 142,118,387.20-212,894,145.60-81,463,254.40

Finding the Fourth Proportional to 142,118,387.20, 212,894,145.60 and 81,463,254.40

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Solution

The fourth proportional to 142,118,387.20, 212,894,145.60 and 81,463,254.40 is: 122,032,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,118,387.20 : 212,894,145.60 = 81,463,254.40 : x
  2. Step 2: Convert to fraction form
    142,118,387.20/212,894,145.60 = 81,463,254.40/x
  3. Step 3: Cross multiply
    142,118,387.20x = 212,894,145.60 × 81,463,254.40
  4. Step 4: Simplify right side
    142,118,387.20x = 17,343,049,943,283,442
  5. Step 5: Solve for x
    x = 17,343,049,943,283,442/142,118,387.20
  6. Step 6: Final answer
    x = 122,032,414.56

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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.