Home / 208,108,317.90-287,207,114.67-115,317,931.98

Finding the Fourth Proportional to 208,108,317.90, 287,207,114.67 and 115,317,931.98

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Solution

The fourth proportional to 208,108,317.90, 287,207,114.67 and 115,317,931.98 is: 159,148,518.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,108,317.90 : 287,207,114.67 = 115,317,931.98 : x
  2. Step 2: Convert to fraction form
    208,108,317.90/287,207,114.67 = 115,317,931.98/x
  3. Step 3: Cross multiply
    208,108,317.90x = 287,207,114.67 × 115,317,931.98
  4. Step 4: Simplify right side
    208,108,317.90x = 33,120,130,513,687,124
  5. Step 5: Solve for x
    x = 33,120,130,513,687,124/208,108,317.90
  6. Step 6: Final answer
    x = 159,148,518.66

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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.