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Finding the Fourth Proportional to 145,888.72, 201,326.40 and 78,820.72

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Solution

The fourth proportional to 145,888.72, 201,326.40 and 78,820.72 is: 108,772.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,888.72 : 201,326.40 = 78,820.72 : x
  2. Step 2: Convert to fraction form
    145,888.72/201,326.40 = 78,820.72/x
  3. Step 3: Cross multiply
    145,888.72x = 201,326.40 × 78,820.72
  4. Step 4: Simplify right side
    145,888.72x = 15,868,691,803.01
  5. Step 5: Solve for x
    x = 15,868,691,803.01/145,888.72
  6. Step 6: Final answer
    x = 108,772.58

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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.