Home / 129,389,868.36-178,254,573.48-90,160,466.76

Finding the Fourth Proportional to 129,389,868.36, 178,254,573.48 and 90,160,466.76

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Solution

The fourth proportional to 129,389,868.36, 178,254,573.48 and 90,160,466.76 is: 124,209,999.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,389,868.36 : 178,254,573.48 = 90,160,466.76 : x
  2. Step 2: Convert to fraction form
    129,389,868.36/178,254,573.48 = 90,160,466.76/x
  3. Step 3: Cross multiply
    129,389,868.36x = 178,254,573.48 × 90,160,466.76
  4. Step 4: Simplify right side
    129,389,868.36x = 16,071,515,547,061,518
  5. Step 5: Solve for x
    x = 16,071,515,547,061,518/129,389,868.36
  6. Step 6: Final answer
    x = 124,209,999.99

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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.