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Finding the Fourth Proportional to 71,448.72, 98,529.12 and 65,798.16

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Solution

The fourth proportional to 71,448.72, 98,529.12 and 65,798.16 is: 90,736.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,448.72 : 98,529.12 = 65,798.16 : x
  2. Step 2: Convert to fraction form
    71,448.72/98,529.12 = 65,798.16/x
  3. Step 3: Cross multiply
    71,448.72x = 98,529.12 × 65,798.16
  4. Step 4: Simplify right side
    71,448.72x = 6,483,034,802.42
  5. Step 5: Solve for x
    x = 6,483,034,802.42/71,448.72
  6. Step 6: Final answer
    x = 90,736.89

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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.