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Finding the Fourth Proportional to 113,728.16, 156,945.12 and 63,430.40

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Solution

The fourth proportional to 113,728.16, 156,945.12 and 63,430.40 is: 87,534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,728.16 : 156,945.12 = 63,430.40 : x
  2. Step 2: Convert to fraction form
    113,728.16/156,945.12 = 63,430.40/x
  3. Step 3: Cross multiply
    113,728.16x = 156,945.12 × 63,430.40
  4. Step 4: Simplify right side
    113,728.16x = 9,955,091,739.65
  5. Step 5: Solve for x
    x = 9,955,091,739.65/113,728.16
  6. Step 6: Final answer
    x = 87,534.10

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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.