Home / 100,430.40-138,602.72-55,117.13

Finding the Fourth Proportional to 100,430.40, 138,602.72 and 55,117.13

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Solution

The fourth proportional to 100,430.40, 138,602.72 and 55,117.13 is: 76,066.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,430.40 : 138,602.72 = 55,117.13 : x
  2. Step 2: Convert to fraction form
    100,430.40/138,602.72 = 55,117.13/x
  3. Step 3: Cross multiply
    100,430.40x = 138,602.72 × 55,117.13
  4. Step 4: Simplify right side
    100,430.40x = 7,639,383,718.72
  5. Step 5: Solve for x
    x = 7,639,383,718.72/100,430.40
  6. Step 6: Final answer
    x = 76,066.45

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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.