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Finding the Fourth Proportional to 98,854.79, 136,421.48 and 54,142.79

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Solution

The fourth proportional to 98,854.79, 136,421.48 and 54,142.79 is: 74,718.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,854.79 : 136,421.48 = 54,142.79 : x
  2. Step 2: Convert to fraction form
    98,854.79/136,421.48 = 54,142.79/x
  3. Step 3: Cross multiply
    98,854.79x = 136,421.48 × 54,142.79
  4. Step 4: Simplify right side
    98,854.79x = 7,386,238,996.38
  5. Step 5: Solve for x
    x = 7,386,238,996.38/98,854.79
  6. Step 6: Final answer
    x = 74,718.07

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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.