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Finding the Fourth Proportional to 138,397.58, 207,596.34 and 99,031.58

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Solution

The fourth proportional to 138,397.58, 207,596.34 and 99,031.58 is: 148,547.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,397.58 : 207,596.34 = 99,031.58 : x
  2. Step 2: Convert to fraction form
    138,397.58/207,596.34 = 99,031.58/x
  3. Step 3: Cross multiply
    138,397.58x = 207,596.34 × 99,031.58
  4. Step 4: Simplify right side
    138,397.58x = 20,558,593,552.42
  5. Step 5: Solve for x
    x = 20,558,593,552.42/138,397.58
  6. Step 6: Final answer
    x = 148,547.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.