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Finding the Fourth Proportional to 78,647.63, 117,931.32 and 26,038.13

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Solution

The fourth proportional to 78,647.63, 117,931.32 and 26,038.13 is: 39,043.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,647.63 : 117,931.32 = 26,038.13 : x
  2. Step 2: Convert to fraction form
    78,647.63/117,931.32 = 26,038.13/x
  3. Step 3: Cross multiply
    78,647.63x = 117,931.32 × 26,038.13
  4. Step 4: Simplify right side
    78,647.63x = 3,070,710,451.58
  5. Step 5: Solve for x
    x = 3,070,710,451.58/78,647.63
  6. Step 6: Final answer
    x = 39,043.91

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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.