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Finding the Fourth Proportional to 86,315.16, 129,420.88 and 33,749.40

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Solution

The fourth proportional to 86,315.16, 129,420.88 and 33,749.40 is: 50,603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,315.16 : 129,420.88 = 33,749.40 : x
  2. Step 2: Convert to fraction form
    86,315.16/129,420.88 = 33,749.40/x
  3. Step 3: Cross multiply
    86,315.16x = 129,420.88 × 33,749.40
  4. Step 4: Simplify right side
    86,315.16x = 4,367,877,047.47
  5. Step 5: Solve for x
    x = 4,367,877,047.47/86,315.16
  6. Step 6: Final answer
    x = 50,603.82

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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.