Home / 208,108,317.15-287,207,113.64-115,317,931.23

Finding the Fourth Proportional to 208,108,317.15, 287,207,113.64 and 115,317,931.23

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Solution

The fourth proportional to 208,108,317.15, 287,207,113.64 and 115,317,931.23 is: 159,148,517.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,108,317.15 : 287,207,113.64 = 115,317,931.23 : x
  2. Step 2: Convert to fraction form
    208,108,317.15/287,207,113.64 = 115,317,931.23/x
  3. Step 3: Cross multiply
    208,108,317.15x = 287,207,113.64 × 115,317,931.23
  4. Step 4: Simplify right side
    208,108,317.15x = 33,120,130,178,927,724
  5. Step 5: Solve for x
    x = 33,120,130,178,927,724/208,108,317.15
  6. Step 6: Final answer
    x = 159,148,517.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.