Home / 66,689,931.69-100,020,900.74-18,809,678.25

Finding the Fourth Proportional to 66,689,931.69, 100,020,900.74 and 18,809,678.25

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Solution

The fourth proportional to 66,689,931.69, 100,020,900.74 and 18,809,678.25 is: 28,210,569.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,689,931.69 : 100,020,900.74 = 18,809,678.25 : x
  2. Step 2: Convert to fraction form
    66,689,931.69/100,020,900.74 = 18,809,678.25/x
  3. Step 3: Cross multiply
    66,689,931.69x = 100,020,900.74 × 18,809,678.25
  4. Step 4: Simplify right side
    66,689,931.69x = 1,881,360,961,100,538.50
  5. Step 5: Solve for x
    x = 1,881,360,961,100,538.50/66,689,931.69
  6. Step 6: Final answer
    x = 28,210,569.62

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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.