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Finding the Fourth Proportional to 98,312.48, 135,566.16 and 64,720.16

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Solution

The fourth proportional to 98,312.48, 135,566.16 and 64,720.16 is: 89,244.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,312.48 : 135,566.16 = 64,720.16 : x
  2. Step 2: Convert to fraction form
    98,312.48/135,566.16 = 64,720.16/x
  3. Step 3: Cross multiply
    98,312.48x = 135,566.16 × 64,720.16
  4. Step 4: Simplify right side
    98,312.48x = 8,773,863,565.79
  5. Step 5: Solve for x
    x = 8,773,863,565.79/98,312.48
  6. Step 6: Final answer
    x = 89,244.66

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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.