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Finding the Fourth Proportional to 86,585.60, 129,878.40 and 49,619.20

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Solution

The fourth proportional to 86,585.60, 129,878.40 and 49,619.20 is: 74,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,585.60 : 129,878.40 = 49,619.20 : x
  2. Step 2: Convert to fraction form
    86,585.60/129,878.40 = 49,619.20/x
  3. Step 3: Cross multiply
    86,585.60x = 129,878.40 × 49,619.20
  4. Step 4: Simplify right side
    86,585.60x = 6,444,462,305.28
  5. Step 5: Solve for x
    x = 6,444,462,305.28/86,585.60
  6. Step 6: Final answer
    x = 74,428.80

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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.