Home / 103,209.72-142,459.65-67,405.29

Finding the Fourth Proportional to 103,209.72, 142,459.65 and 67,405.29

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Solution

The fourth proportional to 103,209.72, 142,459.65 and 67,405.29 is: 93,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,209.72 : 142,459.65 = 67,405.29 : x
  2. Step 2: Convert to fraction form
    103,209.72/142,459.65 = 67,405.29/x
  3. Step 3: Cross multiply
    103,209.72x = 142,459.65 × 67,405.29
  4. Step 4: Simplify right side
    103,209.72x = 9,602,534,021.55
  5. Step 5: Solve for x
    x = 9,602,534,021.55/103,209.72
  6. Step 6: Final answer
    x = 93,039.05

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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.