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Finding the Fourth Proportional to 78,897.79, 118,302.90 and 26,278.57

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Solution

The fourth proportional to 78,897.79, 118,302.90 and 26,278.57 is: 39,403.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.79 : 118,302.90 = 26,278.57 : x
  2. Step 2: Convert to fraction form
    78,897.79/118,302.90 = 26,278.57/x
  3. Step 3: Cross multiply
    78,897.79x = 118,302.90 × 26,278.57
  4. Step 4: Simplify right side
    78,897.79x = 3,108,831,038.85
  5. Step 5: Solve for x
    x = 3,108,831,038.85/78,897.79
  6. Step 6: Final answer
    x = 39,403.27

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1.5x scale

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.