Home / 142,118,038.20-212,893,622.10-81,462,905.40

Finding the Fourth Proportional to 142,118,038.20, 212,893,622.10 and 81,462,905.40

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Solution

The fourth proportional to 142,118,038.20, 212,893,622.10 and 81,462,905.40 is: 122,031,891.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,118,038.20 : 212,893,622.10 = 81,462,905.40 : x
  2. Step 2: Convert to fraction form
    142,118,038.20/212,893,622.10 = 81,462,905.40/x
  3. Step 3: Cross multiply
    142,118,038.20x = 212,893,622.10 × 81,462,905.40
  4. Step 4: Simplify right side
    142,118,038.20x = 17,342,932,997,395,650
  5. Step 5: Solve for x
    x = 17,342,932,997,395,650/142,118,038.20
  6. Step 6: Final answer
    x = 122,031,891.36

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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.