Home / 128,482,386.10-192,788,897.55-85,381,573.30

Finding the Fourth Proportional to 128,482,386.10, 192,788,897.55 and 85,381,573.30

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Solution

The fourth proportional to 128,482,386.10, 192,788,897.55 and 85,381,573.30 is: 128,115,766.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482,386.10 : 192,788,897.55 = 85,381,573.30 : x
  2. Step 2: Convert to fraction form
    128,482,386.10/192,788,897.55 = 85,381,573.30/x
  3. Step 3: Cross multiply
    128,482,386.10x = 192,788,897.55 × 85,381,573.30
  4. Step 4: Simplify right side
    128,482,386.10x = 16,460,619,387,591,516
  5. Step 5: Solve for x
    x = 16,460,619,387,591,516/128,482,386.10
  6. Step 6: Final answer
    x = 128,115,766.58

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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.