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Finding the Fourth Proportional to 128,056.86, 176,728.24 and 70,707.24

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Solution

The fourth proportional to 128,056.86, 176,728.24 and 70,707.24 is: 97,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,056.86 : 176,728.24 = 70,707.24 : x
  2. Step 2: Convert to fraction form
    128,056.86/176,728.24 = 70,707.24/x
  3. Step 3: Cross multiply
    128,056.86x = 176,728.24 × 70,707.24
  4. Step 4: Simplify right side
    128,056.86x = 12,495,966,080.46
  5. Step 5: Solve for x
    x = 12,495,966,080.46/128,056.86
  6. Step 6: Final answer
    x = 97,581.39

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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.