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Finding the Fourth Proportional to 98,920.72, 136,510.68 and 54,208.72

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Solution

The fourth proportional to 98,920.72, 136,510.68 and 54,208.72 is: 74,808.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,920.72 : 136,510.68 = 54,208.72 : x
  2. Step 2: Convert to fraction form
    98,920.72/136,510.68 = 54,208.72/x
  3. Step 3: Cross multiply
    98,920.72x = 136,510.68 × 54,208.72
  4. Step 4: Simplify right side
    98,920.72x = 7,400,069,229.13
  5. Step 5: Solve for x
    x = 7,400,069,229.13/98,920.72
  6. Step 6: Final answer
    x = 74,808.08

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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.