Home / 315,021,755.70-472,390,915.95-120,868,643.70

Finding the Fourth Proportional to 315,021,755.70, 472,390,915.95 and 120,868,643.70

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Solution

The fourth proportional to 315,021,755.70, 472,390,915.95 and 120,868,643.70 is: 181,248,590.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,021,755.70 : 472,390,915.95 = 120,868,643.70 : x
  2. Step 2: Convert to fraction form
    315,021,755.70/472,390,915.95 = 120,868,643.70/x
  3. Step 3: Cross multiply
    315,021,755.70x = 472,390,915.95 × 120,868,643.70
  4. Step 4: Simplify right side
    315,021,755.70x = 57,097,249,307,077,200
  5. Step 5: Solve for x
    x = 57,097,249,307,077,200/315,021,755.70
  6. Step 6: Final answer
    x = 181,248,590.85

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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.