Home / 128,889,767.10-193,166,689.05-52,149,978.30

Finding the Fourth Proportional to 128,889,767.10, 193,166,689.05 and 52,149,978.30

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Solution

The fourth proportional to 128,889,767.10, 193,166,689.05 and 52,149,978.30 is: 78,157,008.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889,767.10 : 193,166,689.05 = 52,149,978.30 : x
  2. Step 2: Convert to fraction form
    128,889,767.10/193,166,689.05 = 52,149,978.30/x
  3. Step 3: Cross multiply
    128,889,767.10x = 193,166,689.05 × 52,149,978.30
  4. Step 4: Simplify right side
    128,889,767.10x = 10,073,638,642,240,348
  5. Step 5: Solve for x
    x = 10,073,638,642,240,348/128,889,767.10
  6. Step 6: Final answer
    x = 78,157,008.65

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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.