Home / 100,031.40-138,061.80-64,266.12

Finding the Fourth Proportional to 100,031.40, 138,061.80 and 64,266.12

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Solution

The fourth proportional to 100,031.40, 138,061.80 and 64,266.12 is: 88,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,031.40 : 138,061.80 = 64,266.12 : x
  2. Step 2: Convert to fraction form
    100,031.40/138,061.80 = 64,266.12/x
  3. Step 3: Cross multiply
    100,031.40x = 138,061.80 × 64,266.12
  4. Step 4: Simplify right side
    100,031.40x = 8,872,696,206.22
  5. Step 5: Solve for x
    x = 8,872,696,206.22/100,031.40
  6. Step 6: Final answer
    x = 88,699.11

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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.