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Finding the Fourth Proportional to 91,878.70, 137,809.95 and 25,312.90

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Solution

The fourth proportional to 91,878.70, 137,809.95 and 25,312.90 is: 37,967.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,878.70 : 137,809.95 = 25,312.90 : x
  2. Step 2: Convert to fraction form
    91,878.70/137,809.95 = 25,312.90/x
  3. Step 3: Cross multiply
    91,878.70x = 137,809.95 × 25,312.90
  4. Step 4: Simplify right side
    91,878.70x = 3,488,369,483.36
  5. Step 5: Solve for x
    x = 3,488,369,483.36/91,878.70
  6. Step 6: Final answer
    x = 37,967.12

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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.