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Finding the Fourth Proportional to 99,628.79, 137,484.99 and 54,307.65

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Solution

The fourth proportional to 99,628.79, 137,484.99 and 54,307.65 is: 74,943.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,628.79 : 137,484.99 = 54,307.65 : x
  2. Step 2: Convert to fraction form
    99,628.79/137,484.99 = 54,307.65/x
  3. Step 3: Cross multiply
    99,628.79x = 137,484.99 × 54,307.65
  4. Step 4: Simplify right side
    99,628.79x = 7,466,486,829.39
  5. Step 5: Solve for x
    x = 7,466,486,829.39/99,628.79
  6. Step 6: Final answer
    x = 74,943.07

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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.