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Finding the Fourth Proportional to 86,303.79, 129,486.78 and 30,152.16

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Solution

The fourth proportional to 86,303.79, 129,486.78 and 30,152.16 is: 45,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,303.79 : 129,486.78 = 30,152.16 : x
  2. Step 2: Convert to fraction form
    86,303.79/129,486.78 = 30,152.16/x
  3. Step 3: Cross multiply
    86,303.79x = 129,486.78 × 30,152.16
  4. Step 4: Simplify right side
    86,303.79x = 3,904,306,108.44
  5. Step 5: Solve for x
    x = 3,904,306,108.44/86,303.79
  6. Step 6: Final answer
    x = 45,239.10

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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.