Home / 128,724,779.20-193,311,117.60-68,258,603.20

Finding the Fourth Proportional to 128,724,779.20, 193,311,117.60 and 68,258,603.20

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Solution

The fourth proportional to 128,724,779.20, 193,311,117.60 and 68,258,603.20 is: 102,506,657.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,724,779.20 : 193,311,117.60 = 68,258,603.20 : x
  2. Step 2: Convert to fraction form
    128,724,779.20/193,311,117.60 = 68,258,603.20/x
  3. Step 3: Cross multiply
    128,724,779.20x = 193,311,117.60 × 68,258,603.20
  4. Step 4: Simplify right side
    128,724,779.20x = 13,195,146,870,406,936
  5. Step 5: Solve for x
    x = 13,195,146,870,406,936/128,724,779.20
  6. Step 6: Final answer
    x = 102,506,657.63

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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.