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Finding the Fourth Proportional to 117,129.40, 175,459.14 and 70,356.76

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Solution

The fourth proportional to 117,129.40, 175,459.14 and 70,356.76 is: 105,394.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.40 : 175,459.14 = 70,356.76 : x
  2. Step 2: Convert to fraction form
    117,129.40/175,459.14 = 70,356.76/x
  3. Step 3: Cross multiply
    117,129.40x = 175,459.14 × 70,356.76
  4. Step 4: Simplify right side
    117,129.40x = 12,344,736,602.79
  5. Step 5: Solve for x
    x = 12,344,736,602.79/117,129.40
  6. Step 6: Final answer
    x = 105,394.01

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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.