Home / 315,021,751.45-472,390,909.57-120,868,639.45

Finding the Fourth Proportional to 315,021,751.45, 472,390,909.57 and 120,868,639.45

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Solution

The fourth proportional to 315,021,751.45, 472,390,909.57 and 120,868,639.45 is: 181,248,584.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,021,751.45 : 472,390,909.57 = 120,868,639.45 : x
  2. Step 2: Convert to fraction form
    315,021,751.45/472,390,909.57 = 120,868,639.45/x
  3. Step 3: Cross multiply
    315,021,751.45x = 472,390,909.57 × 120,868,639.45
  4. Step 4: Simplify right side
    315,021,751.45x = 57,097,246,528,273,888
  5. Step 5: Solve for x
    x = 57,097,246,528,273,888/315,021,751.45
  6. Step 6: Final answer
    x = 181,248,584.47

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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.