Home / 78,921,804.30-118,382,706.45-72,875,186.70

Finding the Fourth Proportional to 78,921,804.30, 118,382,706.45 and 72,875,186.70

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Solution

The fourth proportional to 78,921,804.30, 118,382,706.45 and 72,875,186.70 is: 109,312,780.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921,804.30 : 118,382,706.45 = 72,875,186.70 : x
  2. Step 2: Convert to fraction form
    78,921,804.30/118,382,706.45 = 72,875,186.70/x
  3. Step 3: Cross multiply
    78,921,804.30x = 118,382,706.45 × 72,875,186.70
  4. Step 4: Simplify right side
    78,921,804.30x = 8,627,161,834,595,045
  5. Step 5: Solve for x
    x = 8,627,161,834,595,045/78,921,804.30
  6. Step 6: Final answer
    x = 109,312,780.05

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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.