Home / 128,210.48-176,931.76-71,615.28

Finding the Fourth Proportional to 128,210.48, 176,931.76 and 71,615.28

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Solution

The fourth proportional to 128,210.48, 176,931.76 and 71,615.28 is: 98,829.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.48 : 176,931.76 = 71,615.28 : x
  2. Step 2: Convert to fraction form
    128,210.48/176,931.76 = 71,615.28/x
  3. Step 3: Cross multiply
    128,210.48x = 176,931.76 × 71,615.28
  4. Step 4: Simplify right side
    128,210.48x = 12,671,017,533.29
  5. Step 5: Solve for x
    x = 12,671,017,533.29/128,210.48
  6. Step 6: Final answer
    x = 98,829.81

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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.