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Finding the Fourth Proportional to 130,044, 179,460.72 and 70,428

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Solution

The fourth proportional to 130,044, 179,460.72 and 70,428 is: 97,190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,044 : 179,460.72 = 70,428 : x
  2. Step 2: Convert to fraction form
    130,044/179,460.72 = 70,428/x
  3. Step 3: Cross multiply
    130,044x = 179,460.72 × 70,428
  4. Step 4: Simplify right side
    130,044x = 12,639,059,588.16
  5. Step 5: Solve for x
    x = 12,639,059,588.16/130,044
  6. Step 6: Final answer
    x = 97,190.64

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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.