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Finding the Fourth Proportional to 86,974.88, 130,420.12 and 42,549.60

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Solution

The fourth proportional to 86,974.88, 130,420.12 and 42,549.60 is: 63,803.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,974.88 : 130,420.12 = 42,549.60 : x
  2. Step 2: Convert to fraction form
    86,974.88/130,420.12 = 42,549.60/x
  3. Step 3: Cross multiply
    86,974.88x = 130,420.12 × 42,549.60
  4. Step 4: Simplify right side
    86,974.88x = 5,549,323,937.95
  5. Step 5: Solve for x
    x = 5,549,323,937.95/86,974.88
  6. Step 6: Final answer
    x = 63,803.76

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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.