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Finding the Fourth Proportional to 98,442.09, 135,802.80 and 64,435.59

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Solution

The fourth proportional to 98,442.09, 135,802.80 and 64,435.59 is: 88,890.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,442.09 : 135,802.80 = 64,435.59 : x
  2. Step 2: Convert to fraction form
    98,442.09/135,802.80 = 64,435.59/x
  3. Step 3: Cross multiply
    98,442.09x = 135,802.80 × 64,435.59
  4. Step 4: Simplify right side
    98,442.09x = 8,750,533,541.65
  5. Step 5: Solve for x
    x = 8,750,533,541.65/98,442.09
  6. Step 6: Final answer
    x = 88,890.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.