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Finding the Fourth Proportional to 113,430.40, 156,532.80 and 63,126.40

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Solution

The fourth proportional to 113,430.40, 156,532.80 and 63,126.40 is: 87,113.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,430.40 : 156,532.80 = 63,126.40 : x
  2. Step 2: Convert to fraction form
    113,430.40/156,532.80 = 63,126.40/x
  3. Step 3: Cross multiply
    113,430.40x = 156,532.80 × 63,126.40
  4. Step 4: Simplify right side
    113,430.40x = 9,881,352,145.92
  5. Step 5: Solve for x
    x = 9,881,352,145.92/113,430.40
  6. Step 6: Final answer
    x = 87,113.79

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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.